42356456 has 8 divisors (see below), whose sum is σ = 79418370. Its totient is φ = 21178224.

The previous prime is 42356441. The next prime is 42356467. The reversal of 42356456 is 65465324.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 40576900 + 1779556 = 6370^2 + 1334^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2647271 + ... + 2647286.

Almost surely, 2^42356456 is an apocalyptic number.

It is an amenable number.

42356456 is a deficient number, since it is larger than the sum of its proper divisors (37061914).

42356456 is a wasteful number, since it uses less digits than its factorization.

42356456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5294563 (or 5294559 counting only the distinct ones).

The product of its digits is 86400, while the sum is 35.

The square root of 42356456 is about 6508.1837712222. The cubic root of 42356456 is about 348.5832690082.

The spelling of 42356456 in words is "forty-two million, three hundred fifty-six thousand, four hundred fifty-six".