12766565 has 8 divisors (see below), whose sum is σ = 17508480. Its totient is φ = 8754192.

The previous prime is 12766561. The next prime is 12766573. The reversal of 12766565 is 56566721.

12766565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12766565 - 2² = 12766561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12766561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182345 + ... + 182414.

It is an arithmetic number, because the mean of its divisors is an integer number (2188560).

Almost surely, 2^12766565 is an apocalyptic number.

It is an amenable number.

12766565 is a deficient number, since it is larger than the sum of its proper divisors (4741915).

12766565 is an equidigital number, since it uses as much as digits as its factorization.

12766565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364771.

The product of its digits is 75600, while the sum is 38.

The square root of 12766565 is about 3573.0330253162. The cubic root of 12766565 is about 233.7175653472.

It can be divided in two parts, 12766 and 565, that added together give a palindrome (13331).

The spelling of 12766565 in words is "twelve million, seven hundred sixty-six thousand, five hundred sixty-five".