11713565 has 12 divisors (see below), whose sum is σ = 14319804. Its totient is φ = 9198336.

The previous prime is 11713553. The next prime is 11713607. The reversal of 11713565 is 56531711.

It can be written as a sum of positive squares in 2 ways, for example, as 4024036 + 7689529 = 2006^2 + 2773^2 .

It is not a de Polignac number, because 11713565 - 2⁸ = 11713309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17069 + ... + 17741.

It is an arithmetic number, because the mean of its divisors is an integer number (1193317).

Almost surely, 2^11713565 is an apocalyptic number.

It is an amenable number.

11713565 is a deficient number, since it is larger than the sum of its proper divisors (2606239).

11713565 is an frugal number, since it uses more digits than its factorization.

11713565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796 (or 737 counting only the distinct ones).

The product of its digits is 3150, while the sum is 29.

The square root of 11713565 is about 3422.5085828965. The cubic root of 11713565 is about 227.1065695345.

The spelling of 11713565 in words is "eleven million, seven hundred thirteen thousand, five hundred sixty-five".