45232921 has 4 divisors (see below), whose sum is σ = 45260644. Its totient is φ = 45205200.

The previous prime is 45232919. The next prime is 45232931. The reversal of 45232921 is 12923254.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12923254 = 2 ⋅6461627.

It can be written as a sum of positive squares in 2 ways, for example, as 7778521 + 37454400 = 2789^2 + 6120^2 .

It is a cyclic number.

It is not a de Polignac number, because 45232921 - 2¹ = 45232919 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45232921.

It is not an unprimeable number, because it can be changed into a prime (45232931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11250 + ... + 14731.

It is an arithmetic number, because the mean of its divisors is an integer number (11315161).

Almost surely, 2^45232921 is an apocalyptic number.

It is an amenable number.

45232921 is a deficient number, since it is larger than the sum of its proper divisors (27723).

45232921 is a wasteful number, since it uses less digits than its factorization.

45232921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27722.

The product of its digits is 4320, while the sum is 28.

The square root of 45232921 is about 6725.5424316556. The cubic root of 45232921 is about 356.3019599599.

The spelling of 45232921 in words is "forty-five million, two hundred thirty-two thousand, nine hundred twenty-one".