13276565 has 4 divisors (see below), whose sum is σ = 15931884. Its totient is φ = 10621248.

The previous prime is 13276547. The next prime is 13276591. The reversal of 13276565 is 56567231.

13276565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2531281 + 10745284 = 1591^2 + 3278^2 .

It is a cyclic number.

It is not a de Polignac number, because 13276565 - 2²⁰ = 12227989 is a prime.

It is a Duffinian number.

It is a congruent 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, 1327652 + ... + 1327661.

It is an arithmetic number, because the mean of its divisors is an integer number (3982971).

Almost surely, 2^13276565 is an apocalyptic number.

It is an amenable number.

13276565 is a deficient number, since it is larger than the sum of its proper divisors (2655319).

13276565 is an equidigital number, since it uses as much as digits as its factorization.

13276565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655318.

The product of its digits is 37800, while the sum is 35.

The square root of 13276565 is about 3643.7021008859. The cubic root of 13276565 is about 236.7892100502.

The spelling of 13276565 in words is "thirteen million, two hundred seventy-six thousand, five hundred sixty-five".