Number
1,391
1,391 is a composite number, odd, a calendar year.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 14
- Digital root
- 5
- Palindrome
- No
- Divisor count
- 4
- σ(n) — sum of divisors
- 1,512
Primality
Prime factorization: 13 × 107
Divisors & multiples
Aliquot sum (sum of proper divisors):
121
First multiples
Representations
- In words
- one thousand three hundred ninety-one
- Ordinal
- 1391st
- Roman numeral
- MCCCXCI
- Binary
- 10101101111
- Octal
- 2557
- Hexadecimal
- 56F
Also seen as
Unicode codepoint
կ
U+056F
Lowercase letter (Ll)
UTF-8 encoding: D5 AF (2 bytes).
Hex color
#00056F
RGB(0, 5, 111)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.111.