56585421 has 12 divisors (see below), whose sum is σ = 81860220. Its totient is φ = 37665600.

The previous prime is 56585413. The next prime is 56585423. The reversal of 56585421 is 12458565.

56585421 is a `hidden beast` number, since 56 + 585 + 4 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 40182921 + 16402500 = 6339^2 + 4050^2 .

It is not a de Polignac number, because 56585421 - 2³ = 56585413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56585423) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1825 + ... + 10793.

It is an arithmetic number, because the mean of its divisors is an integer number (6821685).

Almost surely, 2^56585421 is an apocalyptic number.

It is an amenable number.

56585421 is a deficient number, since it is larger than the sum of its proper divisors (25274799).

56585421 is a wasteful number, since it uses less digits than its factorization.

56585421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9676 (or 9673 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 56585421 is about 7522.3281635409. The cubic root of 56585421 is about 383.9147963630.

The spelling of 56585421 in words is "fifty-six million, five hundred eighty-five thousand, four hundred twenty-one".