12123172 has 12 divisors (see below), whose sum is σ = 21312256. Its totient is φ = 6033960.

The previous prime is 12123151. The next prime is 12123173. The reversal of 12123172 is 27132121.

12123172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12123173) 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, 5904 + ... + 7687.

Almost surely, 2^12123172 is an apocalyptic number.

It is an amenable number.

12123172 is a deficient number, since it is larger than the sum of its proper divisors (9189084).

12123172 is a wasteful number, since it uses less digits than its factorization.

12123172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13818 (or 13816 counting only the distinct ones).

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

The square root of 12123172 is about 3481.8345738992. The cubic root of 12123172 is about 229.7234988573.

Adding to 12123172 its reverse (27132121), we get a palindrome (39255293).

The spelling of 12123172 in words is "twelve million, one hundred twenty-three thousand, one hundred seventy-two".