number.wiki
Number

1,491

1,491 is a composite number, odd, a calendar year.

Deficient Number Sphenic Number Squarefree 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

All divisors (8)
1 · 3 · 7 · 21 · 71 · 213 · 497 · 1491
Aliquot sum (sum of proper divisors): 813
Factor pairs (a × b = 1,491)
1 × 1491
3 × 497
7 × 213
21 × 71
First multiples
1,491 · 2,982 · 4,473 · 5,964 · 7,455 · 8,946 · 10,437 · 11,928 · 13,419 · 14,910

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.