42705420 has 24 divisors (see below), whose sum is σ = 119575344. Its totient is φ = 11388096.

The previous prime is 42705419. The next prime is 42705431. The reversal of 42705420 is 2450724.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355819 + ... + 355938.

It is an arithmetic number, because the mean of its divisors is an integer number (4982306).

Almost surely, 2^42705420 is an apocalyptic number.

It is an amenable number.

42705420 is an abundant number, since it is smaller than the sum of its proper divisors (76869924).

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

42705420 is a wasteful number, since it uses less digits than its factorization.

42705420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711769 (or 711767 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 42705420 is about 6534.9384082790. The cubic root of 42705420 is about 349.5379481146.

The spelling of 42705420 in words is "forty-two million, seven hundred five thousand, four hundred twenty".