12205198 has 4 divisors (see below), whose sum is σ = 18307800. Its totient is φ = 6102598.

The previous prime is 12205181. The next prime is 12205213. The reversal of 12205198 is 89150221.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3051298 + ... + 3051301.

It is an arithmetic number, because the mean of its divisors is an integer number (4576950).

Almost surely, 2^12205198 is an apocalyptic number.

12205198 is a deficient number, since it is larger than the sum of its proper divisors (6102602).

12205198 is an equidigital number, since it uses as much as digits as its factorization.

12205198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6102601.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 12205198 is about 3493.5938516090. The cubic root of 12205198 is about 230.2404416867.

It can be divided in two parts, 12205 and 198, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 12205198 in words is "twelve million, two hundred five thousand, one hundred ninety-eight".