45028321 has 8 divisors (see below), whose sum is σ = 48551720. Its totient is φ = 41513472.

The previous prime is 45028307. The next prime is 45028339. The reversal of 45028321 is 12382054.

It can be written as a sum of positive squares in 4 ways, for example, as 19018321 + 26010000 = 4361^2 + 5100^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45028321 - 2¹¹ = 45026273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45028381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12625 + ... + 15793.

It is an arithmetic number, because the mean of its divisors is an integer number (6068965).

Almost surely, 2^45028321 is an apocalyptic number.

It is an amenable number.

45028321 is a deficient number, since it is larger than the sum of its proper divisors (3523399).

45028321 is a wasteful number, since it uses less digits than its factorization.

45028321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4275.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 45028321 is about 6710.3145231800. The cubic root of 45028321 is about 355.7639331527.

The spelling of 45028321 in words is "forty-five million, twenty-eight thousand, three hundred twenty-one".