12158849 has 2 divisors, whose sum is σ = 12158850. Its totient is φ = 12158848.

The previous prime is 12158813. The next prime is 12158863. The reversal of 12158849 is 94885121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11424400 + 734449 = 3380^2 + 857^2 .

It is an emirp because it is prime and its reverse (94885121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12158849 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12158899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6079424 + 6079425.

It is an arithmetic number, because the mean of its divisors is an integer number (6079425).

Almost surely, 2^12158849 is an apocalyptic number.

It is an amenable number.

12158849 is a deficient number, since it is larger than the sum of its proper divisors (1).

12158849 is an equidigital number, since it uses as much as digits as its factorization.

12158849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 38.

The square root of 12158849 is about 3486.9541149834. The cubic root of 12158849 is about 229.9486274677.

The spelling of 12158849 in words is "twelve million, one hundred fifty-eight thousand, eight hundred forty-nine".