12381329 has 2 divisors, whose sum is σ = 12381330. Its totient is φ = 12381328.

The previous prime is 12381323. The next prime is 12381349. The reversal of 12381329 is 92318321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11662225 + 719104 = 3415^2 + 848^2 .

It is a cyclic number.

It is not a de Polignac number, because 12381329 - 2⁸ = 12381073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12381323) 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, 6190664 + 6190665.

It is an arithmetic number, because the mean of its divisors is an integer number (6190665).

Almost surely, 2^12381329 is an apocalyptic number.

It is an amenable number.

12381329 is a deficient number, since it is larger than the sum of its proper divisors (1).

12381329 is an equidigital number, since it uses as much as digits as its factorization.

12381329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 29.

The square root of 12381329 is about 3518.7112697691. The cubic root of 12381329 is about 231.3426758807.

The spelling of 12381329 in words is "twelve million, three hundred eighty-one thousand, three hundred twenty-nine".