The number 45

Representation numerals

Greek numeral

μεʹ

Arabic numeral

٤٥

Roman numeral

XLV

Maya numeral

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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 = 62 + 32
Difference of 2 squares: 45 = 72 - 22 = 92 - 62 = 232 - 222
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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