NumDic.com
Number:
The number 45
Representation numerals
Greek numeral
μεʹ
Arabic numeral
٤٥
Roman numeral
XLV
Maya numeral
●●
▃▃▃▃▃
Chinese numeral
四十五
Hebrew numeral
מה
Numeral systems
Binary: 101101
Septimal
(base 7)
: 63
Octal: 55
Hexadecimal: 2d
Base 24: 1L
Factorization
45 = 3 × 3 × 5
45 has 6 divisors: 1, 3, 5, 9, 15, 45
Sum of all divisors other than 45:
33
Sums & differences
Sum of 2 squares: 45 = 6
2
+ 3
2
Difference of 2 squares: 45 = 7
2
- 2
2
= 9
2
- 6
2
= 23
2
- 22
2
Characteristics
45 is a triangular number
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The next triangular is:
55
45 is a hexagonal number
45 is a palindromic number in binary system (101101)
Related primes
The 45th prime number is:
197
Previous prime number:
43
— Next prime number:
47
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