100,861
100,861 is a composite number, odd.
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 16
- Digital root
- 7
- Palindrome
- No
- Reversed
- 168,001
- Flips to (rotate 180°)
- 198,001
- Recamán's sequence
- a(254,994) = 100,861
- Divisor count
- 6
- σ(n) — sum of divisors
- 107,450
Primality
Prime factorization: 17 2 × 349
Divisors & multiples
Representations
- In words
- one hundred thousand eight hundred sixty-one
- Ordinal
- 100861st
- Binary
- 11000100111111101
- Octal
- 304775
- Hexadecimal
- 0x189FD
- Base64
- AYn9
Also seen as
UTF-8 encoding: F0 98 A7 BD (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.137.253.
- Address
- 0.1.137.253
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.137.253
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 100,861 and was likely granted around 1870.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
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.