56901421 has 2 divisors, whose sum is σ = 56901422. Its totient is φ = 56901420.

The previous prime is 56901391. The next prime is 56901437. The reversal of 56901421 is 12410965.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47817225 + 9084196 = 6915^2 + 3014^2 .

It is a cyclic number.

It is not a de Polignac number, because 56901421 - 2⁵ = 56901389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56901421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56901121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28450710 + 28450711.

It is an arithmetic number, because the mean of its divisors is an integer number (28450711).

Almost surely, 2^56901421 is an apocalyptic number.

It is an amenable number.

56901421 is a deficient number, since it is larger than the sum of its proper divisors (1).

56901421 is an equidigital number, since it uses as much as digits as its factorization.

56901421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 56901421 is about 7543.3030563540. The cubic root of 56901421 is about 384.6281246416.

The spelling of 56901421 in words is "fifty-six million, nine hundred one thousand, four hundred twenty-one".