Representation numerals

μεʹ

٤٥

XLV

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四十五

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

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The next triangular is: 55

45 is a hexagonal number

45 is a palindromic number in binary system (101101)