45421165 has 4 divisors (see below), whose sum is σ = 54505404. Its totient is φ = 36336928.

The previous prime is 45421147. The next prime is 45421183. The reversal of 45421165 is 56112454.

45421165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (45421147) and next prime (45421183).

It can be written as a sum of positive squares in 2 ways, for example, as 27688644 + 17732521 = 5262^2 + 4211^2 .

It is a cyclic number.

It is not a de Polignac number, because 45421165 - 2⁵ = 45421133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4542112 + ... + 4542121.

It is an arithmetic number, because the mean of its divisors is an integer number (13626351).

Almost surely, 2^45421165 is an apocalyptic number.

It is an amenable number.

45421165 is a deficient number, since it is larger than the sum of its proper divisors (9084239).

45421165 is an equidigital number, since it uses as much as digits as its factorization.

45421165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9084238.

The product of its digits is 4800, while the sum is 28.

The square root of 45421165 is about 6739.5226092061. The cubic root of 45421165 is about 356.7955449860.

It can be divided in two parts, 454211 and 65, that added together give a square (454276 = 674²).

The spelling of 45421165 in words is "forty-five million, four hundred twenty-one thousand, one hundred sixty-five".