12158749 has 2 divisors, whose sum is σ = 12158750. Its totient is φ = 12158748.

The previous prime is 12158737. The next prime is 12158761. The reversal of 12158749 is 94785121.

12158749 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (12158737) and next prime (12158761).

It can be written as a sum of positive squares in only one way, i.e., 9566649 + 2592100 = 3093^2 + 1610^2 .

It is a cyclic number.

It is not a de Polignac number, because 12158749 - 2⁵ = 12158717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12158149) 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, 6079374 + 6079375.

It is an arithmetic number, because the mean of its divisors is an integer number (6079375).

Almost surely, 2^12158749 is an apocalyptic number.

It is an amenable number.

12158749 is a deficient number, since it is larger than the sum of its proper divisors (1).

12158749 is an equidigital number, since it uses as much as digits as its factorization.

12158749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 12158749 is about 3486.9397757919. The cubic root of 12158749 is about 229.9479970647.

The spelling of 12158749 in words is "twelve million, one hundred fifty-eight thousand, seven hundred forty-nine".