56272421 has 4 divisors (see below), whose sum is σ = 58719072. Its totient is φ = 53825772.

The previous prime is 56272387. The next prime is 56272427. The reversal of 56272421 is 12427265.

It is a happy number.

56272421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12427265 = 5 ⋅2485453.

It is a cyclic number.

It is not a de Polignac number, because 56272421 - 2¹⁴ = 56256037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56272427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1223291 + ... + 1223336.

It is an arithmetic number, because the mean of its divisors is an integer number (14679768).

Almost surely, 2^56272421 is an apocalyptic number.

It is an amenable number.

56272421 is a deficient number, since it is larger than the sum of its proper divisors (2446651).

56272421 is a wasteful number, since it uses less digits than its factorization.

56272421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446650.

The product of its digits is 6720, while the sum is 29.

The square root of 56272421 is about 7501.4945844145. The cubic root of 56272421 is about 383.2056173567.

Adding to 56272421 its reverse (12427265), we get a palindrome (68699686).

The spelling of 56272421 in words is "fifty-six million, two hundred seventy-two thousand, four hundred twenty-one".