56256405 has 16 divisors (see below), whose sum is σ = 90301824. Its totient is φ = 29906240.

The previous prime is 56256371. The next prime is 56256407. The reversal of 56256405 is 50465265.

It is a happy number.

It is not a de Polignac number, because 56256405 - 2¹¹ = 56254357 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56256407) 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, 1161 + ... + 10670.

It is an arithmetic number, because the mean of its divisors is an integer number (5643864).

Almost surely, 2^56256405 is an apocalyptic number.

It is an amenable number.

56256405 is a deficient number, since it is larger than the sum of its proper divisors (34045419).

56256405 is a wasteful number, since it uses less digits than its factorization.

56256405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12156.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 56256405 is about 7500.4269878454. The cubic root of 56256405 is about 383.1692584949.

The spelling of 56256405 in words is "fifty-six million, two hundred fifty-six thousand, four hundred five".