13756565 has 4 divisors (see below), whose sum is σ = 16507884. Its totient is φ = 11005248.

The previous prime is 13756559. The next prime is 13756579. The reversal of 13756565 is 56565731.

13756565 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, and also an emirpimes, since its reverse is a distinct semiprime: 56565731 = 31 ⋅1824701.

It can be written as a sum of positive squares in 2 ways, for example, as 7890481 + 5866084 = 2809^2 + 2422^2 .

It is a cyclic number.

It is not a de Polignac number, because 13756565 - 2⁴ = 13756549 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, 1375652 + ... + 1375661.

It is an arithmetic number, because the mean of its divisors is an integer number (4126971).

Almost surely, 2^13756565 is an apocalyptic number.

It is an amenable number.

13756565 is a deficient number, since it is larger than the sum of its proper divisors (2751319).

13756565 is an equidigital number, since it uses as much as digits as its factorization.

13756565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751318.

The product of its digits is 94500, while the sum is 38.

The square root of 13756565 is about 3708.9843623289. The cubic root of 13756565 is about 239.6091148731.

The spelling of 13756565 in words is "thirteen million, seven hundred fifty-six thousand, five hundred sixty-five".