Number

942

942 is a composite number, even, a calendar year.

942 (nine hundred forty-two) is an even 3-digit number. It is a composite number with 8 divisors, and factors as 2 × 3 × 157. Its proper divisors sum to 954, more than the number itself, making it an abundant number. Written other ways, in Roman numerals it is CMXLII and in binary, 1110101110.

Abundant Number Arithmetic Number Cube-Free Descending Digits Odious Number Pernicious Number Recamán's Sequence Semiperfect Number Sphenic Number Squarefree Year

Interestingness

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7 notable facts · grade B

930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954

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Historical context — 942 AD

Calendar year

Year 942 (CMXLII) was a common year starting on Saturday of the Julian calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 Read the full article on Wikipedia →

Historical context — 942 BC

Decade

The 940s BC is a decade that lasted from 949 BC to 940 BC.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 Read the full article on Wikipedia →

Year facts

Year type: Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
Days in year: 365
ISO weeks: 52
Started on: Monday
January 1, 942
Ended on: Monday
December 31, 942
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 940s
940–949
Century: 10th century
901–1000
Millennium: 1st millennium
1–1000
Years ago: 1,084
1084 years before 2026.

In other calendars

Hebrew: 4702 / 4703 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 330 / 331 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Water zodiac:Tiger
Sexagenary cycle position 39 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1485 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 320 / 321 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 934 / 935 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 864 / 863 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 15
Digit product: 72
Digital root: 6
Palindrome: No
Bit width: 10 bits
Reversed: 249
Recamán's sequence: a(635) = 942
Square (n²): 887,364
Cube (n³): 835,896,888
Divisor count: 8
σ(n) — sum of divisors: 1,896
φ(n) — Euler's totient: 312
Sum of prime factors: 162

Primality

Prime factorization: 2 × 3 × 157

Nearest primes: 941 (−1) · 947 (+5)

Divisors & multiples

All divisors (8)

1 · 2 · 3 · 6 · 157 · 314 · 471 (half) · 942

Aliquot sum (sum of proper divisors): 954

Factor pairs (a × b = 942)

1 × 942

2 × 471

3 × 314

6 × 157

First multiples

942 · 1,884 (double) · 2,826 · 3,768 · 4,710 · 5,652 · 6,594 · 7,536 · 8,478 · 9,420

Sums & aliquot sequence

As consecutive integers: 313 + 314 + 315 234 + 235 + 236 + 237 73 + 74 + … + 84

Aliquot sequence: 942 → 954 → 1,152 → 2,163 → 1,165 → 239 → 1 → 0 — terminates at zero

Continued fraction of √n

√942 = [30; (1, 2, 4, 20, 4, 2, 1, 60)]

Period length 8 — the block in parentheses repeats forever.

Representations

In words: nine hundred forty-two
Ordinal: 942nd
Roman numeral: CMXLII
Binary: 1110101110
Octal: 1656
Hexadecimal: 0x3AE
Base64: A64=
One's complement: 64,593 (16-bit)
Scientific notation: 9.42 × 10²
As a duration: 942 s = 15 minutes, 42 seconds

In other bases

ternary (3) 1021220

quaternary (4) 32232

quinary (5) 12232

senary (6) 4210

septenary (7) 2514

nonary (9) 1256

undecimal (11) 787

duodecimal (12) 666

tridecimal (13) 576

tetradecimal (14) 4b4

pentadecimal (15) 42c

Palindromic in base 11, base 12, base 14

As an angle

942° = 2 × 360° + 222°

222° ≈ 3.875 rad

Compass bearing: SW (southwest)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
Greek (Milesian): ϡμβʹ
Mayan (base 20): 𝋢·𝋧·𝋢
Chinese: 九百四十二
Chinese (financial): 玖佰肆拾貳

In other modern scripts

Eastern Arabic ٩٤٢ Devanagari ९४२ Bengali ৯৪২ Tamil ௯௪௨ Thai ๙๔๒ Tibetan ༩༤༢ Khmer ៩៤២ Lao ໙໔໒ Burmese ၉၄၂

Digit at this position in famous constants

π — Pi (π): Digit 942 = 9
e — Euler's number (e): Digit 942 = 1
φ — Golden ratio (φ): Digit 942 = 1
√2 — Pythagoras's (√2): Digit 942 = 8
ln 2 — Natural log of 2: Digit 942 = 7
γ — Euler-Mascheroni (γ): Digit 942 = 8

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 942, here are decompositions:

5 + 937 = 942
13 + 929 = 942
23 + 919 = 942
31 + 911 = 942
59 + 883 = 942
61 + 881 = 942
79 + 863 = 942
83 + 859 = 942

Showing the first eight; more decompositions exist.

Unicode codepoint

Greek Small Letter Eta With Tonos

U+03AE

Lowercase letter (Ll)

UTF-8 encoding: CE AE (2 bytes).

Lookup U+03AE on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0003AE

RGB(0, 3, 174)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.174.

Address: 0.0.3.174
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.3.174

Unspecified address (0.0.0.0/8) — "this network" placeholder.

Musical pitch

Heard as a frequency, 942 Hz is closest to:

Concert pitch (A4 = 440 Hz): A♯5 (932.3 Hz, +18¢)
Scientific pitch (C4 = 256 Hz): B5 (966.5 Hz, -45¢ — about midway to A♯5)
Baroque pitch (A4 = 415 Hz): B5 (931.6 Hz, +19¢)