56129812 has 12 divisors (see below), whose sum is σ = 99097236. Its totient is φ = 27816320.

The previous prime is 56129803. The next prime is 56129833. The reversal of 56129812 is 21892165.

It can be written as a sum of positive squares in 2 ways, for example, as 25260676 + 30869136 = 5026^2 + 5556^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61639 + ... + 62542.

It is an arithmetic number, because the mean of its divisors is an integer number (8258103).

Almost surely, 2^56129812 is an apocalyptic number.

It is an amenable number.

56129812 is a deficient number, since it is larger than the sum of its proper divisors (42967424).

56129812 is a wasteful number, since it uses less digits than its factorization.

56129812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124298 (or 124296 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The square root of 56129812 is about 7491.9831820420. The cubic root of 56129812 is about 382.8816291662.

The spelling of 56129812 in words is "fifty-six million, one hundred twenty-nine thousand, eight hundred twelve".