15397265 has 8 divisors (see below), whose sum is σ = 19898088. Its totient is φ = 11370240.

The previous prime is 15397259. The next prime is 15397279. The reversal of 15397265 is 56279351.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 528529 + 14868736 = 727^2 + 3856^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15397265 - 2¹⁸ = 15135121 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118376 + ... + 118505.

It is an arithmetic number, because the mean of its divisors is an integer number (2487261).

Almost surely, 2^15397265 is an apocalyptic number.

It is an amenable number.

15397265 is a deficient number, since it is larger than the sum of its proper divisors (4500823).

15397265 is a wasteful number, since it uses less digits than its factorization.

15397265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236899.

The product of its digits is 56700, while the sum is 38.

The square root of 15397265 is about 3923.9348873293. The cubic root of 15397265 is about 248.7794642001.

The spelling of 15397265 in words is "fifteen million, three hundred ninety-seven thousand, two hundred sixty-five".