42505456 has 20 divisors (see below), whose sum is σ = 94119472. Its totient is φ = 18216576.

The previous prime is 42505453. The next prime is 42505469. The reversal of 42505456 is 65450524.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42505453) 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, 189645 + ... + 189868.

Almost surely, 2^42505456 is an apocalyptic number.

It is an amenable number.

42505456 is an abundant number, since it is smaller than the sum of its proper divisors (51614016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42505456 is a wasteful number, since it uses less digits than its factorization.

42505456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379528 (or 379522 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 42505456 is about 6519.6208478714. The cubic root of 42505456 is about 348.9915351680.

The spelling of 42505456 in words is "forty-two million, five hundred five thousand, four hundred fifty-six".