12158239 has 2 divisors, whose sum is σ = 12158240. Its totient is φ = 12158238.

The previous prime is 12158219. The next prime is 12158257. The reversal of 12158239 is 93285121.

It is a strong prime.

It is an emirp because it is prime and its reverse (93285121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12158239 - 2²¹ = 10061087 is a prime.

It is a super-2 number, since 2×12158239² = 295645551162242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12158239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12158219) 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, 6079119 + 6079120.

It is an arithmetic number, because the mean of its divisors is an integer number (6079120).

Almost surely, 2^12158239 is an apocalyptic number.

12158239 is a deficient number, since it is larger than the sum of its proper divisors (1).

12158239 is an equidigital number, since it uses as much as digits as its factorization.

12158239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 31.

The square root of 12158239 is about 3486.8666449981. The cubic root of 12158239 is about 229.9447819555.

The spelling of 12158239 in words is "twelve million, one hundred fifty-eight thousand, two hundred thirty-nine".