2,642
2,642 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 14
- Digit product
- 96
- Digital root
- 5
- Palindrome
- No
- Bit width
- 12 bits
- Reversed
- 2,462
- Recamán's sequence
- a(7,348) = 2,642
- Square (n²)
- 6,980,164
- Cube (n³)
- 18,441,593,288
- Divisor count
- 4
- σ(n) — sum of divisors
- 3,966
- φ(n) — Euler's totient
- 1,320
- Sum of prime factors
- 1,323
Primality
Prime factorization: 2 × 1321
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- two thousand six hundred forty-two
- Ordinal
- 2642nd
- Roman numeral
- MMDCXLII
- Binary
- 101001010010
- Octal
- 5122
- Hexadecimal
- 0xA52
- Base64
- ClI=
- One's complement
- 62,893 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹 𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵βχμβʹ
- Mayan (base 20)
- 𝋦·𝋬·𝋢
- Chinese
- 二千六百四十二
- Chinese (financial)
- 貳仟陸佰肆拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 2,642 = 6
- e — Euler's number (e)
- Digit 2,642 = 0
- φ — Golden ratio (φ)
- Digit 2,642 = 5
- √2 — Pythagoras's (√2)
- Digit 2,642 = 0
- ln 2 — Natural log of 2
- Digit 2,642 = 2
- γ — Euler-Mascheroni (γ)
- Digit 2,642 = 0
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 2642, here are decompositions:
- 103 + 2539 = 2642
- 139 + 2503 = 2642
- 271 + 2371 = 2642
- 331 + 2311 = 2642
- 349 + 2293 = 2642
- 373 + 2269 = 2642
- 421 + 2221 = 2642
- 439 + 2203 = 2642
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.0.10.82.
- Address
- 0.0.10.82
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.10.82
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.
The digit sequence 2642 first appears in π at position 819 of the decimal expansion (the 819ordinal-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.