15117265 has 16 divisors (see below), whose sum is σ = 18928080. Its totient is φ = 11576320.

The previous prime is 15117251. The next prime is 15117287. The reversal of 15117265 is 56271151.

It can be written as a sum of positive squares in 8 ways, for example, as 2099601 + 13017664 = 1449^2 + 3608^2 .

It is not a de Polignac number, because 15117265 - 2⁹ = 15116753 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19485 + ... + 20245.

It is an arithmetic number, because the mean of its divisors is an integer number (1183005).

Almost surely, 2^15117265 is an apocalyptic number.

It is an amenable number.

15117265 is a deficient number, since it is larger than the sum of its proper divisors (3810815).

15117265 is a wasteful number, since it uses less digits than its factorization.

15117265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932.

The product of its digits is 2100, while the sum is 28.

The square root of 15117265 is about 3888.0927200878. The cubic root of 15117265 is about 247.2622074131.

The spelling of 15117265 in words is "fifteen million, one hundred seventeen thousand, two hundred sixty-five".