Number
1,801
1,801 is a prime, odd, a calendar year.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 10
- Digital root
- 1
- Palindrome
- No
- Divisor count
- 2
- σ(n) — sum of divisors
- 1,802
Primality
1,801 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Aliquot sum (sum of proper divisors):
1
First multiples
Representations
- In words
- one thousand eight hundred one
- Ordinal
- 1801st
- Roman numeral
- MDCCCI
- Binary
- 11100001001
- Octal
- 3411
- Hexadecimal
- 709
Also seen as
Unicode codepoint
܉
U+0709
Other punctuation (Po)
UTF-8 encoding: DC 89 (2 bytes).
Hex color
#000709
RGB(0, 7, 9)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.9.