12644971 has 4 divisors (see below), whose sum is σ = 12652200. Its totient is φ = 12637744.

The previous prime is 12644941. The next prime is 12645011. The reversal of 12644971 is 17944621.

12644971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12644971 - 2⁹ = 12644459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12644921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840 + ... + 5098.

It is an arithmetic number, because the mean of its divisors is an integer number (3163050).

Almost surely, 2^12644971 is an apocalyptic number.

12644971 is a deficient number, since it is larger than the sum of its proper divisors (7229).

12644971 is an equidigital number, since it uses as much as digits as its factorization.

12644971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7228.

The product of its digits is 12096, while the sum is 34.

The square root of 12644971 is about 3555.9767996993. The cubic root of 12644971 is about 232.9731897658.

The spelling of 12644971 in words is "twelve million, six hundred forty-four thousand, nine hundred seventy-one".