12531443 has 2 divisors, whose sum is σ = 12531444. Its totient is φ = 12531442.

The previous prime is 12531437. The next prime is 12531461. The reversal of 12531443 is 34413521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12531443 - 2¹⁶ = 12465907 is a prime.

It is not a weakly prime, because it can be changed into another prime (12531473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6265721 + 6265722.

It is an arithmetic number, because the mean of its divisors is an integer number (6265722).

Almost surely, 2^12531443 is an apocalyptic number.

12531443 is a deficient number, since it is larger than the sum of its proper divisors (1).

12531443 is an equidigital number, since it uses as much as digits as its factorization.

12531443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 23.

The square root of 12531443 is about 3539.9778247893. The cubic root of 12531443 is about 232.2738727154.

Adding to 12531443 its reverse (34413521), we get a palindrome (46944964).

The spelling of 12531443 in words is "twelve million, five hundred thirty-one thousand, four hundred forty-three".