12578443 has 2 divisors, whose sum is σ = 12578444. Its totient is φ = 12578442.

The previous prime is 12578441. The next prime is 12578471. The reversal of 12578443 is 34487521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12578443 - 2¹ = 12578441 is a prime.

Together with 12578441, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12578399 and 12578408.

It is not a weakly prime, because it can be changed into another prime (12578441) 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, 6289221 + 6289222.

It is an arithmetic number, because the mean of its divisors is an integer number (6289222).

Almost surely, 2^12578443 is an apocalyptic number.

12578443 is a deficient number, since it is larger than the sum of its proper divisors (1).

12578443 is an equidigital number, since it uses as much as digits as its factorization.

12578443 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 12578443 is about 3546.6100716036. The cubic root of 12578443 is about 232.5638965707.

The spelling of 12578443 in words is "twelve million, five hundred seventy-eight thousand, four hundred forty-three".