45432921 has 4 divisors (see below), whose sum is σ = 60577232. Its totient is φ = 30288612.

The previous prime is 45432917. The next prime is 45432941. The reversal of 45432921 is 12923454.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 45432921 - 2² = 45432917 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45432911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7572151 + ... + 7572156.

It is an arithmetic number, because the mean of its divisors is an integer number (15144308).

Almost surely, 2^45432921 is an apocalyptic number.

It is an amenable number.

45432921 is a deficient number, since it is larger than the sum of its proper divisors (15144311).

45432921 is a wasteful number, since it uses less digits than its factorization.

45432921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15144310.

The product of its digits is 8640, while the sum is 30.

The square root of 45432921 is about 6740.3947213795. The cubic root of 45432921 is about 356.8263245180.

The spelling of 45432921 in words is "forty-five million, four hundred thirty-two thousand, nine hundred twenty-one".