Number

141

141 is a composite number, odd, a calendar year.

141 (one hundred forty-one) is an odd 3-digit number. It is a composite number with 4 divisors, and factors as 3 × 47. Its digits read the same forwards and backwards, so it is a palindromic number. Written other ways, in Roman numerals it is CXLI and in binary, 10001101.

Arithmetic Number Cube-Free Deficient Number Evil Number Palindrome Recamán's Sequence Semiprime Squarefree Undulating Number Year

Interestingness

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7 notable facts · grade B

129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153

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Historical context — 141 AD

Calendar year

Year 141 (CXLI) 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 — 141 BC

Calendar year

Year 141 BC was a year of the pre-Julian Roman calendar.

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: Sunday
January 1, 141
Ended on: Sunday
December 31, 141
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 140s
140–149
Century: 2nd century
101–200
Millennium: 1st millennium
1–1000
Years ago: 1,885
1885 years before 2026.

In other calendars

Hebrew: 3901 / 3902 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Metal zodiac:Snake
Sexagenary cycle position 18 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 684 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 133 / 134 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 63 / 62 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 6
Digit product: 4
Digital root: 6
Palindrome: Yes
Bit width: 8 bits
Recamán's sequence: a(750) = 141
Square (n²): 19,881
Cube (n³): 2,803,221
Divisor count: 4
σ(n) — sum of divisors: 192
φ(n) — Euler's totient: 92
Sum of prime factors: 50

Primality

Prime factorization: 3 × 47

Nearest primes: 139 (−2) · 149 (+8)

Divisors & multiples

All divisors (4)

1 · 3 · 47 · 141

Aliquot sum (sum of proper divisors): 51

Factor pairs (a × b = 141)

1 × 141

3 × 47

First multiples

141 · 282 (double) · 423 · 564 · 705 · 846 · 987 · 1,128 · 1,269 · 1,410

Sums & aliquot sequence

As consecutive integers: 70 + 71 46 + 47 + 48 21 + 22 + 23 + 24 + 25 + 26

Aliquot sequence: 141 → 51 → 21 → 11 → 1 → 0 — terminates at zero

Continued fraction of √n

√141 = [11; (1, 6, 1, 22)]

Period length 4 — the block in parentheses repeats forever.

Representations

In words: one hundred forty-one
Ordinal: 141st
Roman numeral: CXLI
Binary: 10001101
Octal: 215
Hexadecimal: 0x8D
Base64: jQ==
One's complement: 114 (8-bit)
Scientific notation: 1.41 × 10²
As a duration: 141 s = 2 minutes, 21 seconds

In other bases

ternary (3) 12020

quaternary (4) 2031

quinary (5) 1031

senary (6) 353

septenary (7) 261

nonary (9) 166

undecimal (11) 119

duodecimal (12) b9

tridecimal (13) ab

tetradecimal (14) a1

pentadecimal (15) 96

Palindromic in base 6

As an angle

141°

141° ≈ 2.461 rad

Compass bearing: SE (southeast)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒁹𒁹 𒌋𒌋𒁹
Egyptian hieroglyphic: 𓍢𓎆𓎆𓎆𓎆𓏺
Greek (Milesian): ρμαʹ
Mayan (base 20): 𝋧·𝋡
Chinese: 一百四十一
Chinese (financial): 壹佰肆拾壹

In other modern scripts

Eastern Arabic ١٤١ Devanagari १४१ Bengali ১৪১ Tamil ௧௪௧ Thai ๑๔๑ Tibetan ༡༤༡ Khmer ១៤១ Lao ໑໔໑ Burmese ၁၄၁

Digit at this position in famous constants

π — Pi (π): Digit 141 = 2
e — Euler's number (e): Digit 141 = 0
φ — Golden ratio (φ): Digit 141 = 9
√2 — Pythagoras's (√2): Digit 141 = 4
ln 2 — Natural log of 2: Digit 141 = 3
γ — Euler-Mascheroni (γ): Digit 141 = 2

Also seen as

Unicode codepoint

Reverse Line Feed

U+008D

Control character (Cc)

UTF-8 encoding: C2 8D (2 bytes).

Lookup U+008D on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00008D

RGB(0, 0, 141)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.141.

Address: 0.0.0.141
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.141

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

Musical pitch

Heard as a frequency, 141 Hz is closest to:

Concert pitch (A4 = 440 Hz): C♯3 (138.6 Hz, +30¢)
Scientific pitch (C4 = 256 Hz): D3 (143.7 Hz, -33¢)
Baroque pitch (A4 = 415 Hz): D3 (138.5 Hz, +31¢)