12171172 has 48 divisors (see below), whose sum is σ = 24586240. Its totient is φ = 5225472.

The previous prime is 12171161. The next prime is 12171179. The reversal of 12171172 is 27117121.

It is not an unprimeable number, because it can be changed into a prime (12171179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95773 + ... + 95899.

Almost surely, 2^12171172 is an apocalyptic number.

It is an amenable number.

12171172 is an abundant number, since it is smaller than the sum of its proper divisors (12415068).

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

12171172 is a wasteful number, since it uses less digits than its factorization.

12171172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 258 counting only the distinct ones).

The product of its digits is 196, while the sum is 22.

The square root of 12171172 is about 3488.7206824279. The cubic root of 12171172 is about 230.0262855907.

Adding to 12171172 its reverse (27117121), we get a palindrome (39288293).

The spelling of 12171172 in words is "twelve million, one hundred seventy-one thousand, one hundred seventy-two".