12180194 has 24 divisors (see below), whose sum is σ = 20914068. Its totient is φ = 5287680.

The previous prime is 12180187. The next prime is 12180199. The reversal of 12180194 is 49108121.

It can be written as a sum of positive squares in 6 ways, for example, as 8922169 + 3258025 = 2987^2 + 1805^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12180199) 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, 6704 + ... + 8324.

Almost surely, 2^12180194 is an apocalyptic number.

12180194 is a deficient number, since it is larger than the sum of its proper divisors (8733874).

12180194 is a wasteful number, since it uses less digits than its factorization.

12180194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670 (or 1653 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 12180194 is about 3490.0134670227. The cubic root of 12180194 is about 230.0831079625.

The spelling of 12180194 in words is "twelve million, one hundred eighty thousand, one hundred ninety-four".