Number
4,021
4,021 is a prime, odd.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 7
- Digital root
- 7
- Palindrome
- No
- Divisor count
- 2
- σ(n) — sum of divisors
- 4,022
Primality
4,021 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Aliquot sum (sum of proper divisors):
1
First multiples
Representations
- In words
- four thousand twenty-one
- Ordinal
- 4021st
- Binary
- 111110110101
- Octal
- 7665
- Hexadecimal
- FB5
Also seen as
Prime neighborhood
Unicode codepoint
ྵ
U+0FB5
Non-spacing mark (Mn)
UTF-8 encoding: E0 BE B5 (3 bytes).
Hex color
#000FB5
RGB(0, 15, 181)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.15.181.