12812749 has 2 divisors, whose sum is σ = 12812750. Its totient is φ = 12812748.

The previous prime is 12812729. The next prime is 12812777. The reversal of 12812749 is 94721821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12638025 + 174724 = 3555^2 + 418^2 .

It is a cyclic number.

It is not a de Polignac number, because 12812749 - 2⁷ = 12812621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12812729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6406374 + 6406375.

It is an arithmetic number, because the mean of its divisors is an integer number (6406375).

Almost surely, 2^12812749 is an apocalyptic number.

It is an amenable number.

12812749 is a deficient number, since it is larger than the sum of its proper divisors (1).

12812749 is an equidigital number, since it uses as much as digits as its factorization.

12812749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 34.

The square root of 12812749 is about 3579.4900474788. The cubic root of 12812749 is about 233.9990564162. Note that the first 3 decimals are identical.

The spelling of 12812749 in words is "twelve million, eight hundred twelve thousand, seven hundred forty-nine".