12170872 has 16 divisors (see below), whose sum is σ = 26080560. Its totient is φ = 5216064.

The previous prime is 12170869. The next prime is 12170947. The reversal of 12170872 is 27807121.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 12170872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108613 + ... + 108724.

It is an arithmetic number, because the mean of its divisors is an integer number (1630035).

Almost surely, 2^12170872 is an apocalyptic number.

It is an amenable number.

12170872 is an abundant number, since it is smaller than the sum of its proper divisors (13909688).

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

12170872 is a wasteful number, since it uses less digits than its factorization.

12170872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217350 (or 217346 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 12170872 is about 3488.6776864594. The cubic root of 12170872 is about 230.0243956480.

Adding to 12170872 its reverse (27807121), we get a palindrome (39977993).

The spelling of 12170872 in words is "twelve million, one hundred seventy thousand, eight hundred seventy-two".