56012421 has 4 divisors (see below), whose sum is σ = 74683232. Its totient is φ = 37341612.

The previous prime is 56012371. The next prime is 56012423. The reversal of 56012421 is 12421065.

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 not a de Polignac number, because 56012421 - 2⁹ = 56011909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56012423) 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, 9335401 + ... + 9335406.

It is an arithmetic number, because the mean of its divisors is an integer number (18670808).

Almost surely, 2^56012421 is an apocalyptic number.

It is an amenable number.

56012421 is a deficient number, since it is larger than the sum of its proper divisors (18670811).

56012421 is a wasteful number, since it uses less digits than its factorization.

56012421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18670810.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 56012421 is about 7484.1446405050. The cubic root of 56012421 is about 382.6145207946.

Adding to 56012421 its reverse (12421065), we get a palindrome (68433486).

The spelling of 56012421 in words is "fifty-six million, twelve thousand, four hundred twenty-one".