12198149 has 4 divisors (see below), whose sum is σ = 12241536. Its totient is φ = 12154764.

The previous prime is 12198139. The next prime is 12198157. The reversal of 12198149 is 94189121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94189121 = 13 ⋅7245317.

It is a cyclic number.

It is not a de Polignac number, because 12198149 - 2¹⁶ = 12132613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12198139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21269 + ... + 21834.

It is an arithmetic number, because the mean of its divisors is an integer number (3060384).

Almost surely, 2^12198149 is an apocalyptic number.

It is an amenable number.

12198149 is a deficient number, since it is larger than the sum of its proper divisors (43387).

12198149 is an equidigital number, since it uses as much as digits as its factorization.

12198149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43386.

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

The square root of 12198149 is about 3492.5848593842. The cubic root of 12198149 is about 230.1961087335.

The spelling of 12198149 in words is "twelve million, one hundred ninety-eight thousand, one hundred forty-nine".