12644269 has 16 divisors (see below), whose sum is σ = 14489856. Its totient is φ = 10929600.

The previous prime is 12644267. The next prime is 12644293. The reversal of 12644269 is 96244621.

12644269 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12644269 - 2¹ = 12644267 is a prime.

It is a super-2 number, since 2×12644269² = 319755077088722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12644267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18799 + ... + 19459.

It is an arithmetic number, because the mean of its divisors is an integer number (905616).

Almost surely, 2^12644269 is an apocalyptic number.

It is an amenable number.

12644269 is a deficient number, since it is larger than the sum of its proper divisors (1845587).

12644269 is a wasteful number, since it uses less digits than its factorization.

12644269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756.

The product of its digits is 20736, while the sum is 34.

The square root of 12644269 is about 3555.8780912737. The cubic root of 12644269 is about 232.9688784285.

The spelling of 12644269 in words is "twelve million, six hundred forty-four thousand, two hundred sixty-nine".