45721456 has 20 divisors (see below), whose sum is σ = 96638904. Its totient is φ = 20782400.

The previous prime is 45721451. The next prime is 45721471. The reversal of 45721456 is 65412754.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45721451) 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, 129715 + ... + 130066.

Almost surely, 2^45721456 is an apocalyptic number.

It is an amenable number.

45721456 is an abundant number, since it is smaller than the sum of its proper divisors (50917448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45721456 is a wasteful number, since it uses less digits than its factorization.

45721456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259800 (or 259794 counting only the distinct ones).

The product of its digits is 33600, while the sum is 34.

The square root of 45721456 is about 6761.7642668168. The cubic root of 45721456 is about 357.5801075639.

The spelling of 45721456 in words is "forty-five million, seven hundred twenty-one thousand, four hundred fifty-six".