56612121 has 4 divisors (see below), whose sum is σ = 75482832. Its totient is φ = 37741412.

The previous prime is 56612113. The next prime is 56612137. The reversal of 56612121 is 12121665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56612121 - 2³ = 56612113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56612091 and 56612100.

It is not an unprimeable number, because it can be changed into a prime (56612141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9435351 + ... + 9435356.

It is an arithmetic number, because the mean of its divisors is an integer number (18870708).

Almost surely, 2^56612121 is an apocalyptic number.

It is an amenable number.

56612121 is a deficient number, since it is larger than the sum of its proper divisors (18870711).

56612121 is a wasteful number, since it uses less digits than its factorization.

56612121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18870710.

The product of its digits is 720, while the sum is 24.

The square root of 56612121 is about 7524.1026707508. The cubic root of 56612121 is about 383.9751706493.

Adding to 56612121 its reverse (12121665), we get a palindrome (68733786).

The spelling of 56612121 in words is "fifty-six million, six hundred twelve thousand, one hundred twenty-one".