Number
145
145 is a composite number, odd, a calendar year.
Properties
- Parity
- Odd
- Digit count
- 3
- Digit sum
- 10
- Digital root
- 1
- Palindrome
- No
- Divisor count
- 4
- σ(n) — sum of divisors
- 180
Primality
Prime factorization: 5 × 29
Divisors & multiples
Aliquot sum (sum of proper divisors):
35
Representations
- In words
- one hundred forty-five
- Ordinal
- 145th
- Roman numeral
- CXLV
- Binary
- 10010001
- Octal
- 221
- Hexadecimal
- 91
Also seen as
Unicode codepoint
U+0091
Control character (Cc)
UTF-8 encoding: C2 91 (2 bytes).
Hex color
#000091
RGB(0, 0, 145)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.145.