56120645 has 16 divisors (see below), whose sum is σ = 77096448. Its totient is φ = 38417280.

The previous prime is 56120639. The next prime is 56120651. The reversal of 56120645 is 54602165.

It is an interprime number because it is at equal distance from previous prime (56120639) and next prime (56120651).

It is not a de Polignac number, because 56120645 - 2⁴ = 56120629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29060 + ... + 30930.

It is an arithmetic number, because the mean of its divisors is an integer number (4818528).

Almost surely, 2^56120645 is an apocalyptic number.

It is an amenable number.

56120645 is a deficient number, since it is larger than the sum of its proper divisors (20975803).

56120645 is a wasteful number, since it uses less digits than its factorization.

56120645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 56120645 is about 7491.3713697827. The cubic root of 56120645 is about 382.8607842303.

It can be divided in two parts, 56120 and 645, that added together give a palindrome (56765).

The spelling of 56120645 in words is "fifty-six million, one hundred twenty thousand, six hundred forty-five".