64056421 has 16 divisors (see below), whose sum is σ = 76003200. Its totient is φ = 53219520.

The previous prime is 64056407. The next prime is 64056427. The reversal of 64056421 is 12465046.

It is a cyclic number.

It is not a de Polignac number, because 64056421 - 2⁹ = 64055909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64056421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64056427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12555 + ... + 16903.

It is an arithmetic number, because the mean of its divisors is an integer number (4750200).

Almost surely, 2^64056421 is an apocalyptic number.

It is an amenable number.

64056421 is a deficient number, since it is larger than the sum of its proper divisors (11946779).

64056421 is a wasteful number, since it uses less digits than its factorization.

64056421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4476.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 64056421 is about 8003.5255356624. The cubic root of 64056421 is about 400.1175092256.

The spelling of 64056421 in words is "sixty-four million, fifty-six thousand, four hundred twenty-one".