12381449 has 4 divisors (see below), whose sum is σ = 12391236. Its totient is φ = 12371664.

The previous prime is 12381443. The next prime is 12381451. The reversal of 12381449 is 94418321.

It is a happy number.

12381449 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6943225 + 5438224 = 2635^2 + 2332^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12381449 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12381443) 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 in 3 ways as a sum of consecutive naturals, for example, 2654 + ... + 5639.

It is an arithmetic number, because the mean of its divisors is an integer number (3097809).

Almost surely, 2^12381449 is an apocalyptic number.

It is an amenable number.

12381449 is a deficient number, since it is larger than the sum of its proper divisors (9787).

12381449 is an equidigital number, since it uses as much as digits as its factorization.

12381449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9786.

The product of its digits is 6912, while the sum is 32.

The square root of 12381449 is about 3518.7283214252. The cubic root of 12381449 is about 231.3434232704.

The spelling of 12381449 in words is "twelve million, three hundred eighty-one thousand, four hundred forty-nine".