Live analysis

72,001

72,001 is a composite number, odd.

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.).

72,001 (seventy-two thousand one) is an odd 5-digit number. It is a composite number with 4 divisors, and factors as 89 × 809. Written other ways, in hexadecimal, 0x11941.

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

Interestingness

★ ★ ★ ☆ ☆

5 notable facts · grade C

71,989 71,990 71,991 71,992 71,993 71,994 71,995 71,996 71,997 71,998 71,999 72,000 72,001 72,002 72,003 72,004 72,005 72,006 72,007 72,008 72,009 72,010 72,011 72,012 72,013

less more

Properties

Parity: Odd
Digit count: 5
Digit sum: 10
Digit product: 0
Digital root: 1
Palindrome: No
Bit width: 17 bits
Reversed: 10,027
Recamán's sequence: a(127,597) = 72,001
Square (n²): 5,184,144,001
Cube (n³): 373,263,552,216,001
Divisor count: 4
σ(n) — sum of divisors: 72,900
φ(n) — Euler's totient: 71,104
Sum of prime factors: 898

Primality

Prime factorization: 89 × 809

Nearest primes: 71,999 (−2) · 72,019 (+18)

Divisors & multiples

All divisors (4)

1 · 89 · 809 · 72001

Aliquot sum (sum of proper divisors): 899

Factor pairs (a × b = 72,001)

1 × 72001

89 × 809

First multiples

72,001 · 144,002 (double) · 216,003 · 288,004 · 360,005 · 432,006 · 504,007 · 576,008 · 648,009 · 720,010

Sums & aliquot sequence

As a sum of two squares: 100² + 249² = 180² + 199²

As consecutive integers: 36,000 + 36,001 765 + 766 + … + 853 316 + 317 + … + 493

Aliquot sequence: 72,001 → 899 → 61 → 1 → 0 — terminates at zero

Continued fraction of √n

√72,001 = [268; (3, 33, 4, 1, 4, 8, 5, 1, 1, 1, 5, 1, 1, 11, 2, 1, 1, 2, 11, 1, 1, 5, 1, 1, …)]

Period length 33 — the block in parentheses repeats forever.

Representations

In words: seventy-two thousand one
Ordinal: 72001st
Binary: 10001100101000001
Octal: 214501
Hexadecimal: 0x11941
Base64: ARlB
One's complement: 4,294,895,294 (32-bit)
Scientific notation: 7.2001 × 10⁴
As a duration: 72,001 s = 20 hours, 1 second

In other bases

ternary (3) 10122202201

quaternary (4) 101211001

quinary (5) 4301001

senary (6) 1313201

septenary (7) 416626

nonary (9) 118681

undecimal (11) 4a106

duodecimal (12) 35801

tridecimal (13) 26a07

tetradecimal (14) 1c34d

pentadecimal (15) 16501

As an angle

72,001° = 200 × 360° + 1°

1° ≈ 0.017 rad

Compass bearing: N (north)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒌋𒌋 · 𒁹
Egyptian hieroglyphic: 𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓏺
Greek (Milesian): ͵οβαʹ
Mayan (base 20): 𝋩·𝋠·𝋠·𝋡
Chinese: 七萬二千零一
Chinese (financial): 柒萬貳仟零壹

In other modern scripts

Eastern Arabic ٧٢٠٠١ Devanagari ७२००१ Bengali ৭২০০১ Tamil ௭௨௦௦௧ Thai ๗๒๐๐๑ Tibetan ༧༢༠༠༡ Khmer ៧២០០១ Lao ໗໒໐໐໑ Burmese ၇၂၀၀၁

Digit at this position in famous constants

π — Pi (π): Digit 72,001 = 6
e — Euler's number (e): Digit 72,001 = 9
φ — Golden ratio (φ): Digit 72,001 = 3
√2 — Pythagoras's (√2): Digit 72,001 = 2
ln 2 — Natural log of 2: Digit 72,001 = 1
γ — Euler-Mascheroni (γ): Digit 72,001 = 5

Also seen as

Unicode codepoint

𑥁

Dives Akuru Initial Ra

U+11941

Other letter (Lo)

UTF-8 encoding: F0 91 A5 81 (4 bytes).

Lookup U+11941 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#011941

RGB(1, 25, 65)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.1.25.65.

Address: 0.1.25.65
Class: reserved
IPv4-mapped IPv6: ::ffff:0.1.25.65

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

Position in π

The digit sequence 72001 first appears in π at position 64,341 of the decimal expansion (the 64,341ordinal-suffix:st 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 72001 on Pi Search ↗