56735921 has 16 divisors (see below), whose sum is σ = 64204800. Its totient is φ = 49669200.

The previous prime is 56735897. The next prime is 56735927. The reversal of 56735921 is 12953765.

It is a happy number.

56735921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 56735921 - 2⁶ = 56735857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56735927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129020 + ... + 129458.

It is an arithmetic number, because the mean of its divisors is an integer number (4012800).

Almost surely, 2^56735921 is an apocalyptic number.

It is an amenable number.

56735921 is a deficient number, since it is larger than the sum of its proper divisors (7468879).

56735921 is a wasteful number, since it uses less digits than its factorization.

56735921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860.

The product of its digits is 56700, while the sum is 38.

The square root of 56735921 is about 7532.3250726452. The cubic root of 56735921 is about 384.2548605608.

The spelling of 56735921 in words is "fifty-six million, seven hundred thirty-five thousand, nine hundred twenty-one".