12198194 has 4 divisors (see below), whose sum is σ = 18297294. Its totient is φ = 6099096.

The previous prime is 12198161. The next prime is 12198217. The reversal of 12198194 is 49189121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49189121 = 101 ⋅487021.

It can be written as a sum of positive squares in only one way, i.e., 6375625 + 5822569 = 2525^2 + 2413^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3049547 + ... + 3049550.

Almost surely, 2^12198194 is an apocalyptic number.

12198194 is a deficient number, since it is larger than the sum of its proper divisors (6099100).

12198194 is an equidigital number, since it uses as much as digits as its factorization.

12198194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6099099.

The product of its digits is 5184, while the sum is 35.

The square root of 12198194 is about 3492.5913015983. The cubic root of 12198194 is about 230.1963918041.

The spelling of 12198194 in words is "twelve million, one hundred ninety-eight thousand, one hundred ninety-four".