12857443 has 2 divisors, whose sum is σ = 12857444. Its totient is φ = 12857442.

The previous prime is 12857431. The next prime is 12857489. The reversal of 12857443 is 34475821.

It is a weak prime.

It is an emirp because it is prime and its reverse (34475821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12857443 - 2²¹ = 10760291 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12857399 and 12857408.

It is not a weakly prime, because it can be changed into another prime (12857413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6428721 + 6428722.

It is an arithmetic number, because the mean of its divisors is an integer number (6428722).

Almost surely, 2^12857443 is an apocalyptic number.

12857443 is a deficient number, since it is larger than the sum of its proper divisors (1).

12857443 is an equidigital number, since it uses as much as digits as its factorization.

12857443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 34.

The square root of 12857443 is about 3585.7276806807. The cubic root of 12857443 is about 234.2708226314.

The spelling of 12857443 in words is "twelve million, eight hundred fifty-seven thousand, four hundred forty-three".