12172312 has 32 divisors (see below), whose sum is σ = 24375600. Its totient is φ = 5681664.

The previous prime is 12172309. The next prime is 12172327. The reversal of 12172312 is 21327121.

12172312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 12172312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10548 + ... + 11644.

Almost surely, 2^12172312 is an apocalyptic number.

It is an amenable number.

12172312 is an abundant number, since it is smaller than the sum of its proper divisors (12203288).

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

12172312 is a wasteful number, since it uses less digits than its factorization.

12172312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195 (or 1191 counting only the distinct ones).

The product of its digits is 168, while the sum is 19.

The square root of 12172312 is about 3488.8840622755. The cubic root of 12172312 is about 230.0334670897.

Adding to 12172312 its reverse (21327121), we get a palindrome (33499433).

The spelling of 12172312 in words is "twelve million, one hundred seventy-two thousand, three hundred twelve".