15942939 has 8 divisors (see below), whose sum is σ = 21353472. Its totient is φ = 10580520.

The previous prime is 15942937. The next prime is 15942943. The reversal of 15942939 is 93924951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15942939 - 2¹ = 15942937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15942939.

It is not an unprimeable number, because it can be changed into a prime (15942931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11247 + ... + 12584.

It is an arithmetic number, because the mean of its divisors is an integer number (2669184).

Almost surely, 2^15942939 is an apocalyptic number.

15942939 is a deficient number, since it is larger than the sum of its proper divisors (5410533).

15942939 is a wasteful number, since it uses less digits than its factorization.

15942939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24057.

The product of its digits is 87480, while the sum is 42.

The square root of 15942939 is about 3992.8610043426. The cubic root of 15942939 is about 251.6843016944.

The spelling of 15942939 in words is "fifteen million, nine hundred forty-two thousand, nine hundred thirty-nine".