15342939 has 20 divisors (see below), whose sum is σ = 23031624. Its totient is φ = 10178784.

The previous prime is 15342931. The next prime is 15342941. The reversal of 15342939 is 93924351.

It is a happy number.

It is not a de Polignac number, because 15342939 - 2³ = 15342931 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (15342931) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24559 + ... + 25175.

Almost surely, 2^15342939 is an apocalyptic number.

15342939 is a deficient number, since it is larger than the sum of its proper divisors (7688685).

15342939 is an equidigital number, since it uses as much as digits as its factorization.

15342939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936 (or 927 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 15342939 is about 3917.0063824303. The cubic root of 15342939 is about 248.4865307998.

The spelling of 15342939 in words is "fifteen million, three hundred forty-two thousand, nine hundred thirty-nine".