15021139 has 16 divisors (see below), whose sum is σ = 18155520. Its totient is φ = 12149280.

The previous prime is 15021131. The next prime is 15021157. The reversal of 15021139 is 93112051.

15021139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 15021139 - 2³ = 15021131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15021131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12129 + ... + 13309.

It is an arithmetic number, because the mean of its divisors is an integer number (1134720).

Almost surely, 2^15021139 is an apocalyptic number.

15021139 is a deficient number, since it is larger than the sum of its proper divisors (3134381).

15021139 is a wasteful number, since it uses less digits than its factorization.

15021139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 15021139 is about 3875.7114185656. The cubic root of 15021139 is about 246.7370047360.

The spelling of 15021139 in words is "fifteen million, twenty-one thousand, one hundred thirty-nine".