12186149 has 2 divisors, whose sum is σ = 12186150. Its totient is φ = 12186148.

The previous prime is 12186137. The next prime is 12186151. The reversal of 12186149 is 94168121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11437924 + 748225 = 3382^2 + 865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12186149 is a prime.

Together with 12186151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12186179) by changing a digit.

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, 6093074 + 6093075.

It is an arithmetic number, because the mean of its divisors is an integer number (6093075).

Almost surely, 2^12186149 is an apocalyptic number.

It is an amenable number.

12186149 is a deficient number, since it is larger than the sum of its proper divisors (1).

12186149 is an equidigital number, since it uses as much as digits as its factorization.

12186149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 32.

The square root of 12186149 is about 3490.8665113407. The cubic root of 12186149 is about 230.1205983800.

The spelling of 12186149 in words is "twelve million, one hundred eighty-six thousand, one hundred forty-nine".