Number
861
861 is a composite number, odd, a calendar year.
Properties
- Parity
- Odd
- Digit count
- 3
- Digit sum
- 15
- Digital root
- 6
- Palindrome
- No
- Divisor count
- 8
- σ(n) — sum of divisors
- 1,344
Primality
Prime factorization: 3 × 7 × 41
Divisors & multiples
Aliquot sum (sum of proper divisors):
483
Representations
- In words
- eight hundred sixty-one
- Ordinal
- 861st
- Roman numeral
- DCCCLXI
- Binary
- 1101011101
- Octal
- 1535
- Hexadecimal
- 35D
Also seen as
Unicode codepoint
͝
U+035D
Non-spacing mark (Mn)
UTF-8 encoding: CD 9D (2 bytes).
Code page identifier
Code page 861 is DOS Icelandic — DOS code page for Icelandic.
Code pages are integer identifiers used by Windows and other systems to refer to specific character encodings.
Hex color
#00035D
RGB(0, 3, 93)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.93.