56459021 has 4 divisors (see below), whose sum is σ = 56586912. Its totient is φ = 56331132.

The previous prime is 56458991. The next prime is 56459041. The reversal of 56459021 is 12095465.

It is a happy number.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56459021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56459041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63281 + ... + 64166.

It is an arithmetic number, because the mean of its divisors is an integer number (14146728).

Almost surely, 2^56459021 is an apocalyptic number.

It is an amenable number.

56459021 is a deficient number, since it is larger than the sum of its proper divisors (127891).

56459021 is a wasteful number, since it uses less digits than its factorization.

56459021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127890.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 56459021 is about 7513.9218122097. The cubic root of 56459021 is about 383.6287214504.

The spelling of 56459021 in words is "fifty-six million, four hundred fifty-nine thousand, twenty-one".