45
Number 45 properties
- 45 is an odd number.
- 45 is triangular and equals T9.
- 45 is a Harshad number, which means it is divisible by the sum of its digits (45 = 9, and 45 is divisible by 9).
Number 45 - properties and curiosities
45 (number)
Prime factorization
Prime factorization of 45: 3^2 × 5.
Divisors
Divisor count: 6
1, 3, 5, 9, 15, 45
Factors of 45 are: 1, 3, 5, 9, 15, 45.
Representations
In octal, 45 is represented as 55.
In binary, 45 is represented as 101101.
In hex, 45 is represented as 2D.
Roman numeral: XLV
Curiosities
- 45 is divisible by the sum of its digits.
Related numbers
Quick answers
Is 45 prime?
No, 45 is not prime.
What are the factors of 45?
1, 3, 5, 9, 15, 45
What is 45 in binary?
101101