12644172 has 36 divisors (see below), whose sum is σ = 32508840. Its totient is φ = 4142592.

The previous prime is 12644167. The next prime is 12644183. The reversal of 12644172 is 27144621.

12644172 is a `hidden beast` number, since 1 + 2 + 644 + 17 + 2 = 666.

12644172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 853 + ... + 5100.

Almost surely, 2^12644172 is an apocalyptic number.

12644172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12644172 is an abundant number, since it is smaller than the sum of its proper divisors (19864668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12644172 is a wasteful number, since it uses less digits than its factorization.

12644172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6022 (or 6017 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 12644172 is about 3555.8644518598. The cubic root of 12644172 is about 232.9682826898.

Adding to 12644172 its reverse (27144621), we get a palindrome (39788793).

The spelling of 12644172 in words is "twelve million, six hundred forty-four thousand, one hundred seventy-two".