56620121 has 8 divisors (see below), whose sum is σ = 58359840. Its totient is φ = 54899712.

The previous prime is 56620103. The next prime is 56620129. The reversal of 56620121 is 12102665.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56620121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56620129) 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 7 ways as a sum of consecutive naturals, for example, 1241 + ... + 10713.

It is an arithmetic number, because the mean of its divisors is an integer number (7294980).

Almost surely, 2^56620121 is an apocalyptic number.

It is an amenable number.

56620121 is a deficient number, since it is larger than the sum of its proper divisors (1739719).

56620121 is a wasteful number, since it uses less digits than its factorization.

56620121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9655.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 56620121 is about 7524.6342768270. The cubic root of 56620121 is about 383.9932566271.

Adding to 56620121 its reverse (12102665), we get a palindrome (68722786).

The spelling of 56620121 in words is "fifty-six million, six hundred twenty thousand, one hundred twenty-one".