Live analysis

42,018

42,018 is a composite number, even.

This number doesn't have a permanent NumberWiki page yet — what you see below is computed live. Pages get added to the permanent index when they're notable (years, primes, curated, etc.).

42,018 (forty-two thousand eighteen) is an even 5-digit number. It is a composite number with 16 divisors, and factors as 2 × 3 × 47 × 149. Its proper divisors sum to 44,382, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0xA422.

Abundant Number Arithmetic Number Cube-Free Odious Number Pernicious Number Recamán's Sequence Semiperfect Number Squarefree

Interestingness

★ ★ ★ ☆ ☆

5 notable facts · grade C

42,006 42,007 42,008 42,009 42,010 42,011 42,012 42,013 42,014 42,015 42,016 42,017 42,018 42,019 42,020 42,021 42,022 42,023 42,024 42,025 42,026 42,027 42,028 42,029 42,030

less more

Properties

Parity: Even
Digit count: 5
Digit sum: 15
Digit product: 0
Digital root: 6
Palindrome: No
Bit width: 16 bits
Reversed: 81,024
Recamán's sequence: a(151,587) = 42,018
Square (n²): 1,765,512,324
Cube (n³): 74,183,296,829,832
Divisor count: 16
σ(n) — sum of divisors: 86,400
φ(n) — Euler's totient: 13,616
Sum of prime factors: 201

Primality

Prime factorization: 2 × 3 × 47 × 149

Nearest primes: 42,017 (−1) · 42,019 (+1)

Divisors & multiples

All divisors (16)

1 · 2 · 3 · 6 · 47 · 94 · 141 · 149 · 282 · 298 · 447 · 894 · 7003 · 14006 · 21009 (half) · 42018

Aliquot sum (sum of proper divisors): 44,382

Factor pairs (a × b = 42,018)

1 × 42018

2 × 21009

3 × 14006

6 × 7003

47 × 894

94 × 447

141 × 298

149 × 282

First multiples

42,018 · 84,036 (double) · 126,054 · 168,072 · 210,090 · 252,108 · 294,126 · 336,144 · 378,162 · 420,180

Sums & aliquot sequence

As consecutive integers: 14,005 + 14,006 + 14,007 10,503 + 10,504 + 10,505 + 10,506 3,496 + 3,497 + … + 3,507 871 + 872 + … + 917

Aliquot sequence: 42,018 → 44,382 → 51,378 → 51,390 → 82,458 → 102,672 → 206,832 → 348,688 → 405,232 → 467,728 → 532,208 → 598,672 → 686,960 → 967,696 → 968,688 → 2,232,744 → 3,531,096 — unresolved within range

Continued fraction of √n

√42,018 = [204; (1, 57, 1, 1, 3, 8, 12, 3, 3, 3, 1, 2, 8, 2, 1, 3, 3, 3, 12, 8, 3, 1, 1, 57, …)]

Period length 26 — the block in parentheses repeats forever.

Representations

In words: forty-two thousand eighteen
Ordinal: 42018th
Binary: 1010010000100010
Octal: 122042
Hexadecimal: 0xA422
Base64: pCI=
One's complement: 23,517 (16-bit)
Scientific notation: 4.2018 × 10⁴
As a duration: 42,018 s = 11 hours, 40 minutes, 18 seconds

In other bases

ternary (3) 2010122020

quaternary (4) 22100202

quinary (5) 2321033

senary (6) 522310

septenary (7) 233334

nonary (9) 63566

undecimal (11) 29629

duodecimal (12) 20396

tridecimal (13) 16182

tetradecimal (14) 11454

pentadecimal (15) c6b3

As an angle

42,018° = 116 × 360° + 258°

258° ≈ 4.503 rad

Compass bearing: WSW (west-southwest)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒌋𒁹 𒌋𒌋𒌋𒌋 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓂍𓂍𓂍𓂍𓆼𓆼𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ͵μβιηʹ
Mayan (base 20): 𝋥·𝋥·𝋠·𝋲
Chinese: 四萬二千零一十八
Chinese (financial): 肆萬貳仟零壹拾捌

In other modern scripts

Eastern Arabic ٤٢٠١٨ Devanagari ४२०१८ Bengali ৪২০১৮ Tamil ௪௨௦௧௮ Thai ๔๒๐๑๘ Tibetan ༤༢༠༡༨ Khmer ៤២០១៨ Lao ໔໒໐໑໘ Burmese ၄၂၀၁၈

Digit at this position in famous constants

π — Pi (π): Digit 42,018 = 7
e — Euler's number (e): Digit 42,018 = 9
φ — Golden ratio (φ): Digit 42,018 = 0
√2 — Pythagoras's (√2): Digit 42,018 = 0
ln 2 — Natural log of 2: Digit 42,018 = 5
γ — Euler-Mascheroni (γ): Digit 42,018 = 2

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 42018, here are decompositions:

5 + 42013 = 42018
19 + 41999 = 42018
37 + 41981 = 42018
59 + 41959 = 42018
61 + 41957 = 42018
71 + 41947 = 42018
107 + 41911 = 42018
131 + 41887 = 42018

Showing the first eight; more decompositions exist.

Unicode codepoint

ꐢ

Yi Syllable Jjuop

U+A422

Other letter (Lo)

UTF-8 encoding: EA 90 A2 (3 bytes).

Lookup U+A422 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00A422

RGB(0, 164, 34)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.164.34.

Address: 0.0.164.34
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.164.34

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

Position in π

The digit sequence 42018 first appears in π at position 30,626 of the decimal expansion (the 30,626ordinal-suffix:th digit after the integer 3).

Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.

Look up 42018 on Pi Search ↗