56401001 has 2 divisors, whose sum is σ = 56401002. Its totient is φ = 56401000.

The previous prime is 56400983. The next prime is 56401021. The reversal of 56401001 is 10010465.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55517401 + 883600 = 7451^2 + 940^2 .

It is a cyclic number.

It is not a de Polignac number, because 56401001 - 2¹⁸ = 56138857 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56401021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28200500 + 28200501.

It is an arithmetic number, because the mean of its divisors is an integer number (28200501).

Almost surely, 2^56401001 is an apocalyptic number.

It is an amenable number.

56401001 is a deficient number, since it is larger than the sum of its proper divisors (1).

56401001 is an equidigital number, since it uses as much as digits as its factorization.

56401001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 56401001 is about 7510.0599864448. The cubic root of 56401001 is about 383.4972646469.

Adding to 56401001 its reverse (10010465), we get a palindrome (66411466).

The spelling of 56401001 in words is "fifty-six million, four hundred one thousand, one".