15243265 has 4 divisors (see below), whose sum is σ = 18291924. Its totient is φ = 12194608.

The previous prime is 15243257. The next prime is 15243281. The reversal of 15243265 is 56234251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2455489 + 12787776 = 1567^2 + 3576^2 .

It is a cyclic number.

It is not a de Polignac number, because 15243265 - 2³ = 15243257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1524322 + ... + 1524331.

It is an arithmetic number, because the mean of its divisors is an integer number (4572981).

Almost surely, 2^15243265 is an apocalyptic number.

It is an amenable number.

15243265 is a deficient number, since it is larger than the sum of its proper divisors (3048659).

15243265 is an equidigital number, since it uses as much as digits as its factorization.

15243265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3048658.

The product of its digits is 7200, while the sum is 28.

The square root of 15243265 is about 3904.2624143364. The cubic root of 15243265 is about 247.9472713514.

The spelling of 15243265 in words is "fifteen million, two hundred forty-three thousand, two hundred sixty-five".