12617172 has 36 divisors (see below), whose sum is σ = 32375616. Its totient is φ = 4142160.

The previous prime is 12617161. The next prime is 12617177. The reversal of 12617172 is 27171621.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12617177) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 204 + ... + 5027.

Almost surely, 2^12617172 is an apocalyptic number.

12617172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12617172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16187808).

12617172 is an abundant number, since it is smaller than the sum of its proper divisors (19758444).

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

12617172 is a wasteful number, since it uses less digits than its factorization.

12617172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5308 (or 5303 counting only the distinct ones).

The product of its digits is 1176, while the sum is 27.

The square root of 12617172 is about 3552.0658777675. The cubic root of 12617172 is about 232.8023399347.

Adding to 12617172 its reverse (27171621), we get a palindrome (39788793).

The spelling of 12617172 in words is "twelve million, six hundred seventeen thousand, one hundred seventy-two".