12172844 has 12 divisors (see below), whose sum is σ = 22423800. Its totient is φ = 5766048.

The previous prime is 12172843. The next prime is 12172871. The reversal of 12172844 is 44827121.

It is not an unprimeable number, because it can be changed into a prime (12172841) 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, 80009 + ... + 80160.

It is an arithmetic number, because the mean of its divisors is an integer number (1868650).

Almost surely, 2^12172844 is an apocalyptic number.

It is an amenable number.

12172844 is a deficient number, since it is larger than the sum of its proper divisors (10250956).

12172844 is a wasteful number, since it uses less digits than its factorization.

12172844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160192 (or 160190 counting only the distinct ones).

The product of its digits is 3584, while the sum is 29.

The square root of 12172844 is about 3488.9603035862. The cubic root of 12172844 is about 230.0368183024.

Adding to 12172844 its reverse (44827121), we get a palindrome (56999965).

The spelling of 12172844 in words is "twelve million, one hundred seventy-two thousand, eight hundred forty-four".