12644765 has 8 divisors (see below), whose sum is σ = 17341440. Its totient is φ = 8670672.

The previous prime is 12644761. The next prime is 12644767. The reversal of 12644765 is 56744621.

12644765 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 12644765 - 2² = 12644761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 361279 = 12644765 / (1 + 2 + 6 + 4 + 4 + 7 + 6 + 5).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12644761) 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, 180605 + ... + 180674.

It is an arithmetic number, because the mean of its divisors is an integer number (2167680).

Almost surely, 2^12644765 is an apocalyptic number.

It is an amenable number.

12644765 is a deficient number, since it is larger than the sum of its proper divisors (4696675).

12644765 is an equidigital number, since it uses as much as digits as its factorization.

12644765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361291.

The product of its digits is 40320, while the sum is 35.

The square root of 12644765 is about 3555.9478342630. The cubic root of 12644765 is about 232.9719246321.

The spelling of 12644765 in words is "twelve million, six hundred forty-four thousand, seven hundred sixty-five".