15952139 has 4 divisors (see below), whose sum is σ = 18231024. Its totient is φ = 13673256.

The previous prime is 15952121. The next prime is 15952141. The reversal of 15952139 is 93125951.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15952139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15952099 and 15952108.

It is not an unprimeable number, because it can be changed into a prime (15952109) 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 3 ways as a sum of consecutive naturals, for example, 1139432 + ... + 1139445.

It is an arithmetic number, because the mean of its divisors is an integer number (4557756).

Almost surely, 2^15952139 is an apocalyptic number.

15952139 is a deficient number, since it is larger than the sum of its proper divisors (2278885).

15952139 is an equidigital number, since it uses as much as digits as its factorization.

15952139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278884.

The product of its digits is 12150, while the sum is 35.

The square root of 15952139 is about 3994.0128943207. The cubic root of 15952139 is about 251.7327045292.

The spelling of 15952139 in words is "fifteen million, nine hundred fifty-two thousand, one hundred thirty-nine".