15245139 has 16 divisors (see below), whose sum is σ = 25018112. Its totient is φ = 8041248.

The previous prime is 15245137. The next prime is 15245161. The reversal of 15245139 is 93154251.

It is not a de Polignac number, because 15245139 - 2¹ = 15245137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15245137) 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, 27649 + ... + 28194.

It is an arithmetic number, because the mean of its divisors is an integer number (1563632).

Almost surely, 2^15245139 is an apocalyptic number.

15245139 is a deficient number, since it is larger than the sum of its proper divisors (9772973).

15245139 is a wasteful number, since it uses less digits than its factorization.

15245139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55866.

The product of its digits is 5400, while the sum is 30.

The square root of 15245139 is about 3904.5024010749. The cubic root of 15245139 is about 247.9574317763.

The spelling of 15245139 in words is "fifteen million, two hundred forty-five thousand, one hundred thirty-nine".