15942642 has 16 divisors (see below), whose sum is σ = 32071680. Its totient is φ = 5283152.

The previous prime is 15942631. The next prime is 15942683. The reversal of 15942642 is 24624951.

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, 6642 + ... + 8717.

It is an arithmetic number, because the mean of its divisors is an integer number (2004480).

Almost surely, 2^15942642 is an apocalyptic number.

15942642 is an abundant number, since it is smaller than the sum of its proper divisors (16129038).

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

15942642 is a wasteful number, since it uses less digits than its factorization.

15942642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15537.

The product of its digits is 17280, while the sum is 33.

The square root of 15942642 is about 3992.8238127921. The cubic root of 15942642 is about 251.6827388144.

The spelling of 15942642 in words is "fifteen million, nine hundred forty-two thousand, six hundred forty-two".