12805747 has 2 divisors, whose sum is σ = 12805748. Its totient is φ = 12805746.

The previous prime is 12805739. The next prime is 12805757. The reversal of 12805747 is 74750821.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12805747 - 2³ = 12805739 is a prime.

It is not a weakly prime, because it can be changed into another prime (12805717) 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, 6402873 + 6402874.

It is an arithmetic number, because the mean of its divisors is an integer number (6402874).

Almost surely, 2^12805747 is an apocalyptic number.

12805747 is a deficient number, since it is larger than the sum of its proper divisors (1).

12805747 is an equidigital number, since it uses as much as digits as its factorization.

12805747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 12805747 is about 3578.5118415341. The cubic root of 12805747 is about 233.9564228395.

The spelling of 12805747 in words is "twelve million, eight hundred five thousand, seven hundred forty-seven".