15268139 has 4 divisors (see below), whose sum is σ = 15623256. Its totient is φ = 14913024.

The previous prime is 15268111. The next prime is 15268147. The reversal of 15268139 is 93186251.

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

It is a cyclic number.

It is not a de Polignac number, because 15268139 - 2¹² = 15264043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15268099 and 15268108.

It is not an unprimeable number, because it can be changed into a prime (15268109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177494 + ... + 177579.

It is an arithmetic number, because the mean of its divisors is an integer number (3905814).

Almost surely, 2^15268139 is an apocalyptic number.

15268139 is a deficient number, since it is larger than the sum of its proper divisors (355117).

15268139 is an equidigital number, since it uses as much as digits as its factorization.

15268139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355116.

The product of its digits is 12960, while the sum is 35.

The square root of 15268139 is about 3907.4466087203. The cubic root of 15268139 is about 248.0820650627.

The spelling of 15268139 in words is "fifteen million, two hundred sixty-eight thousand, one hundred thirty-nine".