12158449 has 2 divisors, whose sum is σ = 12158450. Its totient is φ = 12158448.

The previous prime is 12158431. The next prime is 12158501. The reversal of 12158449 is 94485121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9120400 + 3038049 = 3020^2 + 1743^2 .

It is a cyclic number.

It is not a de Polignac number, because 12158449 - 2¹⁷ = 12027377 is a prime.

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, 6079224 + 6079225.

It is an arithmetic number, because the mean of its divisors is an integer number (6079225).

Almost surely, 2^12158449 is an apocalyptic number.

It is an amenable number.

12158449 is a deficient number, since it is larger than the sum of its proper divisors (1).

12158449 is an equidigital number, since it uses as much as digits as its factorization.

12158449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 34.

The square root of 12158449 is about 3486.8967578636. The cubic root of 12158449 is about 229.9461058349.

The spelling of 12158449 in words is "twelve million, one hundred fifty-eight thousand, four hundred forty-nine".