15121249 has 12 divisors (see below), whose sum is σ = 17901268. Its totient is φ = 12687840.

The previous prime is 15121247. The next prime is 15121277. The reversal of 15121249 is 94212151.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10036224 + 5085025 = 3168^2 + 2255^2 .

It is not a de Polignac number, because 15121249 - 2¹ = 15121247 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (15121241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3234 + ... + 6379.

Almost surely, 2^15121249 is an apocalyptic number.

It is an amenable number.

15121249 is a deficient number, since it is larger than the sum of its proper divisors (2780019).

15121249 is a wasteful number, since it uses less digits than its factorization.

15121249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9648 (or 9637 counting only the distinct ones).

The product of its digits is 720, while the sum is 25.

The square root of 15121249 is about 3888.6050197982. The cubic root of 15121249 is about 247.2839266441.

The spelling of 15121249 in words is "fifteen million, one hundred twenty-one thousand, two hundred forty-nine".