56621001 has 8 divisors (see below), whose sum is σ = 75534624. Its totient is φ = 37727360.

The previous prime is 56620987. The next prime is 56621011. The reversal of 56621001 is 10012665.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56621001 - 2¹⁴ = 56604617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56621011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3865 + ... + 11321.

It is an arithmetic number, because the mean of its divisors is an integer number (9441828).

Almost surely, 2^56621001 is an apocalyptic number.

It is an amenable number.

56621001 is a deficient number, since it is larger than the sum of its proper divisors (18913623).

56621001 is a wasteful number, since it uses less digits than its factorization.

56621001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9991.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 56621001 is about 7524.6927512025. The cubic root of 56621001 is about 383.9952459806.

Adding to 56621001 its reverse (10012665), we get a palindrome (66633666).

The spelling of 56621001 in words is "fifty-six million, six hundred twenty-one thousand, one".