45428521 has 2 divisors, whose sum is σ = 45428522. Its totient is φ = 45428520.

The previous prime is 45428491. The next prime is 45428527. The reversal of 45428521 is 12582454.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45414121 + 14400 = 6739^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 45428521 - 2²⁵ = 11874089 is a prime.

It is not a weakly prime, because it can be changed into another prime (45428527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22714260 + 22714261.

It is an arithmetic number, because the mean of its divisors is an integer number (22714261).

Almost surely, 2^45428521 is an apocalyptic number.

It is an amenable number.

45428521 is a deficient number, since it is larger than the sum of its proper divisors (1).

45428521 is an equidigital number, since it uses as much as digits as its factorization.

45428521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12800, while the sum is 31.

The square root of 45428521 is about 6740.0683230958. The cubic root of 45428521 is about 356.8148050700.

The spelling of 45428521 in words is "forty-five million, four hundred twenty-eight thousand, five hundred twenty-one".