Number
1,491
1,491 is a composite number, odd, a calendar year.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 15
- Digital root
- 6
- Palindrome
- No
- Divisor count
- 8
- σ(n) — sum of divisors
- 2,304
Primality
Prime factorization: 3 × 7 × 71
Divisors & multiples
Aliquot sum (sum of proper divisors):
813
First multiples
Representations
- In words
- one thousand four hundred ninety-one
- Ordinal
- 1491st
- Roman numeral
- MCDXCI
- Binary
- 10111010011
- Octal
- 2723
- Hexadecimal
- 5D3
Also seen as
Unicode codepoint
ד
U+05D3
Other letter (Lo)
UTF-8 encoding: D7 93 (2 bytes).
Hex color
#0005D3
RGB(0, 5, 211)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.211.