56000121 has 4 divisors (see below), whose sum is σ = 74666832. Its totient is φ = 37333412.

The previous prime is 56000111. The next prime is 56000123. The reversal of 56000121 is 12100065.

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 56000121 - 2⁵ = 56000089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56000121.

It is not an unprimeable number, because it can be changed into a prime (56000123) 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 3 ways as a sum of consecutive naturals, for example, 9333351 + ... + 9333356.

It is an arithmetic number, because the mean of its divisors is an integer number (18666708).

Almost surely, 2^56000121 is an apocalyptic number.

It is an amenable number.

56000121 is a deficient number, since it is larger than the sum of its proper divisors (18666711).

56000121 is a wasteful number, since it uses less digits than its factorization.

56000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18666710.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 56000121 is about 7483.3228581961. The cubic root of 56000121 is about 382.5865121075.

Adding to 56000121 its reverse (12100065), we get a palindrome (68100186).

The spelling of 56000121 in words is "fifty-six million, one hundred twenty-one", and thus it is an aban number.