100,642
100,642 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 13
- Digital root
- 4
- Palindrome
- No
- Reversed
- 246,001
- Recamán's sequence
- a(255,432) = 100,642
- Divisor count
- 4
- σ(n) — sum of divisors
- 150,966
Primality
Prime factorization: 2 × 50321
Divisors & multiples
Representations
- In words
- one hundred thousand six hundred forty-two
- Ordinal
- 100642nd
- Binary
- 11000100100100010
- Octal
- 304442
- Hexadecimal
- 0x18922
- Base64
- AYki
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 100642, here are decompositions:
- 29 + 100613 = 100642
- 83 + 100559 = 100642
- 131 + 100511 = 100642
- 149 + 100493 = 100642
- 173 + 100469 = 100642
- 239 + 100403 = 100642
- 251 + 100391 = 100642
- 263 + 100379 = 100642
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 98 A4 A2 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.137.34.
- Address
- 0.1.137.34
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.137.34
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 100,642 and was likely granted around 1870.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.