12172472 has 16 divisors (see below), whose sum is σ = 24579240. Its totient is φ = 5618016.

The previous prime is 12172471. The next prime is 12172477. The reversal of 12172472 is 27427121.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172471) 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, 58418 + ... + 58625.

Almost surely, 2^12172472 is an apocalyptic number.

It is an amenable number.

12172472 is an abundant number, since it is smaller than the sum of its proper divisors (12406768).

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

12172472 is a wasteful number, since it uses less digits than its factorization.

12172472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117062 (or 117058 counting only the distinct ones).

The product of its digits is 1568, while the sum is 26.

The square root of 12172472 is about 3488.9069921682. The cubic root of 12172472 is about 230.0344749835.

Adding to 12172472 its reverse (27427121), we get a palindrome (39599593).

The spelling of 12172472 in words is "twelve million, one hundred seventy-two thousand, four hundred seventy-two".