12172194 has 40 divisors (see below), whose sum is σ = 27477648. Its totient is φ = 4027320.

The previous prime is 12172189. The next prime is 12172219. The reversal of 12172194 is 49127121.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36609 + ... + 36939.

Almost surely, 2^12172194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12172194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13738824).

12172194 is an abundant number, since it is smaller than the sum of its proper divisors (15305454).

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

12172194 is a wasteful number, since it uses less digits than its factorization.

12172194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 563 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 12172194 is about 3488.8671513831. The cubic root of 12172194 is about 230.0327237623.

The spelling of 12172194 in words is "twelve million, one hundred seventy-two thousand, one hundred ninety-four".