Live analysis

2,641

2,641 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.).

2,641 (two thousand six hundred forty-one) is an odd 4-digit number. It is a composite number with 4 divisors, and factors as 19 × 139. Written other ways, in Roman numerals it is MMDCXLI and in binary, 101001010001.

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

Interestingness

★ ★ ★ ☆ ☆

5 notable facts · grade C

2,629 2,630 2,631 2,632 2,633 2,634 2,635 2,636 2,637 2,638 2,639 2,640 2,641 2,642 2,643 2,644 2,645 2,646 2,647 2,648 2,649 2,650 2,651 2,652 2,653

less more

Properties

Parity: Odd
Digit count: 4
Digit sum: 13
Digit product: 48
Digital root: 4
Palindrome: No
Bit width: 12 bits
Reversed: 1,462
Recamán's sequence: a(7,350) = 2,641
Square (n²): 6,974,881
Cube (n³): 18,420,660,721
Divisor count: 4
σ(n) — sum of divisors: 2,800
φ(n) — Euler's totient: 2,484
Sum of prime factors: 158

Primality

Prime factorization: 19 × 139

Nearest primes: 2,633 (−8) · 2,647 (+6)

Divisors & multiples

All divisors (4)

1 · 19 · 139 · 2641

Aliquot sum (sum of proper divisors): 159

Factor pairs (a × b = 2,641)

1 × 2641

19 × 139

First multiples

2,641 · 5,282 (double) · 7,923 · 10,564 · 13,205 · 15,846 · 18,487 · 21,128 · 23,769 · 26,410

Sums & aliquot sequence

As consecutive integers: 1,320 + 1,321 130 + 131 + … + 148 51 + 52 + … + 88

Aliquot sequence: 2,641 → 159 → 57 → 23 → 1 → 0 — terminates at zero

Continued fraction of √n

√2,641 = [51; (2, 1, 1, 3, 1, 2, 6, 2, 33, 1, 3, 1, 12, 20, 2, 10, 1, 13, 1, 3, 2, 1, 6, 6, …)]

Representations

In words: two thousand six hundred forty-one
Ordinal: 2641st
Roman numeral: MMDCXLI
Binary: 101001010001
Octal: 5121
Hexadecimal: 0xA51
Base64: ClE=
One's complement: 62,894 (16-bit)
Scientific notation: 2.641 × 10³
As a duration: 2,641 s = 44 minutes, 1 second

In other bases

ternary (3) 10121211

quaternary (4) 221101

quinary (5) 41031

senary (6) 20121

septenary (7) 10462

nonary (9) 3554

undecimal (11) 1a91

duodecimal (12) 1641

tridecimal (13) 1282

tetradecimal (14) d69

pentadecimal (15) bb1

As an angle

2,641° = 7 × 360° + 121°

121° ≈ 2.112 rad

Compass bearing: ESE (east-southeast)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹 𒁹
Egyptian hieroglyphic: 𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺
Greek (Milesian): ͵βχμαʹ
Mayan (base 20): 𝋦·𝋬·𝋡
Chinese: 二千六百四十一
Chinese (financial): 貳仟陸佰肆拾壹

In other modern scripts

Eastern Arabic ٢٦٤١ Devanagari २६४१ Bengali ২৬৪১ Tamil ௨௬௪௧ Thai ๒๖๔๑ Tibetan ༢༦༤༡ Khmer ២៦៤១ Lao ໒໖໔໑ Burmese ၂၆၄၁

Digit at this position in famous constants

π — Pi (π): Digit 2,641 = 1
e — Euler's number (e): Digit 2,641 = 6
φ — Golden ratio (φ): Digit 2,641 = 7
√2 — Pythagoras's (√2): Digit 2,641 = 6
ln 2 — Natural log of 2: Digit 2,641 = 4
γ — Euler-Mascheroni (γ): Digit 2,641 = 7

Also seen as

Unicode codepoint

ੑ

Gurmukhi Sign Udaat

U+0A51

Non-spacing mark (Mn)

UTF-8 encoding: E0 A9 91 (3 bytes).

Lookup U+0A51 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000A51

RGB(0, 10, 81)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.10.81.

Address: 0.0.10.81
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.10.81

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

Musical pitch

Heard as a frequency, 2,641 Hz is closest to:

Concert pitch (A4 = 440 Hz): E7 (2637 Hz, +3¢)
Scientific pitch (C4 = 256 Hz): E7 (2580.3 Hz, +40¢)
Baroque pitch (A4 = 415 Hz): F7 (2635.1 Hz, +4¢)

Position in π

The digit sequence 2641 first appears in π at position 22,740 of the decimal expansion (the 22,740ordinal-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 2641 on Pi Search ↗