12726565 has 4 divisors (see below), whose sum is σ = 15271884. Its totient is φ = 10181248.

The previous prime is 12726541. The next prime is 12726587. The reversal of 12726565 is 56562721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56562721 = 1153 ⋅49057.

It can be written as a sum of positive squares in 2 ways, for example, as 3448449 + 9278116 = 1857^2 + 3046^2 .

It is a cyclic number.

It is not a de Polignac number, because 12726565 - 2⁵ = 12726533 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 12726565.

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, 1272652 + ... + 1272661.

It is an arithmetic number, because the mean of its divisors is an integer number (3817971).

Almost surely, 2^12726565 is an apocalyptic number.

It is an amenable number.

12726565 is a deficient number, since it is larger than the sum of its proper divisors (2545319).

12726565 is an equidigital number, since it uses as much as digits as its factorization.

12726565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2545318.

The product of its digits is 25200, while the sum is 34.

The square root of 12726565 is about 3567.4311485998. The cubic root of 12726565 is about 233.4732165768.

The spelling of 12726565 in words is "twelve million, seven hundred twenty-six thousand, five hundred sixty-five".