15321265 has 8 divisors (see below), whose sum is σ = 18408960. Its totient is φ = 12241392.

The previous prime is 15321253. The next prime is 15321269. The reversal of 15321265 is 56212351.

15321265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 15321265 - 2¹¹ = 15319217 is a prime.

It is a super-2 number, since 2×15321265² = 469482322400450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15321269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4026 + ... + 6844.

It is an arithmetic number, because the mean of its divisors is an integer number (2301120).

Almost surely, 2^15321265 is an apocalyptic number.

It is an amenable number.

15321265 is a deficient number, since it is larger than the sum of its proper divisors (3087695).

15321265 is a wasteful number, since it uses less digits than its factorization.

15321265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3911.

The product of its digits is 1800, while the sum is 25.

The square root of 15321265 is about 3914.2387510217. The cubic root of 15321265 is about 248.3694685892.

The spelling of 15321265 in words is "fifteen million, three hundred twenty-one thousand, two hundred sixty-five".