56709121 has 12 divisors (see below), whose sum is σ = 66148500. Its totient is φ = 48474720.

The previous prime is 56709113. The next prime is 56709139. The reversal of 56709121 is 12190765.

It can be written as a sum of positive squares in 2 ways, for example, as 2480625 + 54228496 = 1575^2 + 7364^2 .

It is not a de Polignac number, because 56709121 - 2³ = 56709113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56709151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19255 + ... + 22003.

It is an arithmetic number, because the mean of its divisors is an integer number (5512375).

Almost surely, 2^56709121 is an apocalyptic number.

It is an amenable number.

56709121 is a deficient number, since it is larger than the sum of its proper divisors (9439379).

56709121 is a wasteful number, since it uses less digits than its factorization.

56709121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184 (or 3177 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 56709121 is about 7530.5458633488. The cubic root of 56709121 is about 384.1943483257.

Adding to 56709121 its reverse (12190765), we get a palindrome (68899886).

The spelling of 56709121 in words is "fifty-six million, seven hundred nine thousand, one hundred twenty-one".