56620421 has 16 divisors (see below), whose sum is σ = 70435008. Its totient is φ = 44716800.

The previous prime is 56620409. The next prime is 56620423. The reversal of 56620421 is 12402665.

It is not a de Polignac number, because 56620421 - 2⁶ = 56620357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56620423) 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 15 ways as a sum of consecutive naturals, for example, 9215 + ... + 14076.

It is an arithmetic number, because the mean of its divisors is an integer number (4402188).

Almost surely, 2^56620421 is an apocalyptic number.

It is an amenable number.

56620421 is a deficient number, since it is larger than the sum of its proper divisors (13814587).

56620421 is a wasteful number, since it uses less digits than its factorization.

56620421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23332.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 56620421 is about 7524.6542113243. The cubic root of 56620421 is about 383.9939348181.

The spelling of 56620421 in words is "fifty-six million, six hundred twenty thousand, four hundred twenty-one".