12644171 has 4 divisors (see below), whose sum is σ = 12661632. Its totient is φ = 12626712.

The previous prime is 12644167. The next prime is 12644183. The reversal of 12644171 is 17144621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12644171 - 2² = 12644167 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 12644171.

It is not an unprimeable number, because it can be changed into a prime (12644371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7595 + ... + 9108.

It is an arithmetic number, because the mean of its divisors is an integer number (3165408).

Almost surely, 2^12644171 is an apocalyptic number.

12644171 is a deficient number, since it is larger than the sum of its proper divisors (17461).

12644171 is an equidigital number, since it uses as much as digits as its factorization.

12644171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17460.

The product of its digits is 1344, while the sum is 26.

The square root of 12644171 is about 3555.8643112470. The cubic root of 12644171 is about 232.9682765482.

Adding to 12644171 its reverse (17144621), we get a palindrome (29788792).

The spelling of 12644171 in words is "twelve million, six hundred forty-four thousand, one hundred seventy-one".