56423421 has 12 divisors (see below), whose sum is σ = 83488860. Its totient is φ = 36697920.

The previous prime is 56423417. The next prime is 56423449. The reversal of 56423421 is 12432465.

It can be written as a sum of positive squares in 2 ways, for example, as 756900 + 55666521 = 870^2 + 7461^2 .

It is not a de Polignac number, because 56423421 - 2² = 56423417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56423401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76086 + ... + 76823.

It is an arithmetic number, because the mean of its divisors is an integer number (6957405).

Almost surely, 2^56423421 is an apocalyptic number.

It is an amenable number.

56423421 is a deficient number, since it is larger than the sum of its proper divisors (27065439).

56423421 is a wasteful number, since it uses less digits than its factorization.

56423421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152956 (or 152953 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 56423421 is about 7511.5525026455. The cubic root of 56423421 is about 383.5480726675.

Adding to 56423421 its reverse (12432465), we get a palindrome (68855886).

The spelling of 56423421 in words is "fifty-six million, four hundred twenty-three thousand, four hundred twenty-one".