12387172 has 12 divisors (see below), whose sum is σ = 24774400. Its totient is φ = 5308776.

The previous prime is 12387149. The next prime is 12387217. The reversal of 12387172 is 27178321.

12387172 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221172 + ... + 221227.

Almost surely, 2^12387172 is an apocalyptic number.

It is an amenable number.

12387172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12387172 is a wasteful number, since it uses less digits than its factorization.

12387172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442410 (or 442408 counting only the distinct ones).

The product of its digits is 4704, while the sum is 31.

The square root of 12387172 is about 3519.5414474048. The cubic root of 12387172 is about 231.3790619228.

The spelling of 12387172 in words is "twelve million, three hundred eighty-seven thousand, one hundred seventy-two".