13664265 has 16 divisors (see below), whose sum is σ = 21964608. Its totient is φ = 7253696.

The previous prime is 13664257. The next prime is 13664279. The reversal of 13664265 is 56246631.

It is a cyclic number.

It is not a de Polignac number, because 13664265 - 2³ = 13664257 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, 1399 + ... + 5411.

It is an arithmetic number, because the mean of its divisors is an integer number (1372788).

Almost surely, 2^13664265 is an apocalyptic number.

13664265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13664265 is a deficient number, since it is larger than the sum of its proper divisors (8300343).

13664265 is a wasteful number, since it uses less digits than its factorization.

13664265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4248.

The product of its digits is 25920, while the sum is 33.

The square root of 13664265 is about 3696.5206613788. The cubic root of 13664265 is about 239.0720241838.

The spelling of 13664265 in words is "thirteen million, six hundred sixty-four thousand, two hundred sixty-five".