12381443 has 2 divisors, whose sum is σ = 12381444. Its totient is φ = 12381442.

The previous prime is 12381427. The next prime is 12381451. The reversal of 12381443 is 34418321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12381443 - 2⁴ = 12381427 is a prime.

It is not a weakly prime, because it can be changed into another prime (12380443) 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, 6190721 + 6190722.

It is an arithmetic number, because the mean of its divisors is an integer number (6190722).

Almost surely, 2^12381443 is an apocalyptic number.

12381443 is a deficient number, since it is larger than the sum of its proper divisors (1).

12381443 is an equidigital number, since it uses as much as digits as its factorization.

12381443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 26.

The square root of 12381443 is about 3518.7274688444. The cubic root of 12381443 is about 231.3433859010.

Adding to 12381443 its reverse (34418321), we get a palindrome (46799764).

The spelling of 12381443 in words is "twelve million, three hundred eighty-one thousand, four hundred forty-three".