11320565 has 4 divisors (see below), whose sum is σ = 13584684. Its totient is φ = 9056448.

The previous prime is 11320553. The next prime is 11320571. The reversal of 11320565 is 56502311.

11320565 is nontrivially palindromic in base 3.

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 8076964 + 3243601 = 2842^2 + 1801^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11320565 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11320565.

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, 1132052 + ... + 1132061.

It is an arithmetic number, because the mean of its divisors is an integer number (3396171).

Almost surely, 2^11320565 is an apocalyptic number.

It is an amenable number.

11320565 is a deficient number, since it is larger than the sum of its proper divisors (2264119).

11320565 is an equidigital number, since it uses as much as digits as its factorization.

11320565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2264118.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 11320565 is about 3364.6047316141. The cubic root of 11320565 is about 224.5377505742.

Adding to 11320565 its reverse (56502311), we get a palindrome (67822876).

The spelling of 11320565 in words is "eleven million, three hundred twenty thousand, five hundred sixty-five".