56601421 has 2 divisors, whose sum is σ = 56601422. Its totient is φ = 56601420.

The previous prime is 56601407. The next prime is 56601427. The reversal of 56601421 is 12410665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53085796 + 3515625 = 7286^2 + 1875^2 .

It is a cyclic number.

It is not a de Polignac number, because 56601421 - 2²¹ = 54504269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56601427) 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 as a sum of consecutive naturals, namely, 28300710 + 28300711.

It is an arithmetic number, because the mean of its divisors is an integer number (28300711).

Almost surely, 2^56601421 is an apocalyptic number.

It is an amenable number.

56601421 is a deficient number, since it is larger than the sum of its proper divisors (1).

56601421 is an equidigital number, since it uses as much as digits as its factorization.

56601421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 56601421 is about 7523.3915889046. The cubic root of 56601421 is about 383.9509779905.

The spelling of 56601421 in words is "fifty-six million, six hundred one thousand, four hundred twenty-one".