42405942 has 16 divisors (see below), whose sum is σ = 84901680. Its totient is φ = 14120352.

The previous prime is 42405941. The next prime is 42405949. The reversal of 42405942 is 24950424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42405941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3468 + ... + 9840.

It is an arithmetic number, because the mean of its divisors is an integer number (5306355).

Almost surely, 2^42405942 is an apocalyptic number.

42405942 is an abundant number, since it is smaller than the sum of its proper divisors (42495738).

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

42405942 is a wasteful number, since it uses less digits than its factorization.

42405942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7487.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 42405942 is about 6511.9844901535. The cubic root of 42405942 is about 348.7189687321.

The spelling of 42405942 in words is "forty-two million, four hundred five thousand, nine hundred forty-two".