56145405 has 16 divisors (see below), whose sum is σ = 90307584. Its totient is φ = 29785920.

The previous prime is 56145347. The next prime is 56145413. The reversal of 56145405 is 50454165.

It is not a de Polignac number, because 56145405 - 2¹⁹ = 55621117 is a prime.

It is a super-2 number, since 2×56145405² = 6304613005228050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6934 + ... + 12663.

It is an arithmetic number, because the mean of its divisors is an integer number (5644224).

Almost surely, 2^56145405 is an apocalyptic number.

It is an amenable number.

56145405 is a deficient number, since it is larger than the sum of its proper divisors (34162179).

56145405 is a wasteful number, since it uses less digits than its factorization.

56145405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19796.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 56145405 is about 7493.0237554675. The cubic root of 56145405 is about 382.9170810367.

The spelling of 56145405 in words is "fifty-six million, one hundred forty-five thousand, four hundred five".