12708281 has 2 divisors, whose sum is σ = 12708282. Its totient is φ = 12708280.

The previous prime is 12708277. The next prime is 12708301. The reversal of 12708281 is 18280721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12138256 + 570025 = 3484^2 + 755^2 .

It is an emirp because it is prime and its reverse (18280721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12708281 - 2² = 12708277 is a prime.

It is a super-2 number, since 2×12708281² = 323000811949922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12708211) 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, 6354140 + 6354141.

It is an arithmetic number, because the mean of its divisors is an integer number (6354141).

Almost surely, 2^12708281 is an apocalyptic number.

It is an amenable number.

12708281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12708281 is an equidigital number, since it uses as much as digits as its factorization.

12708281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 12708281 is about 3564.8675992244. The cubic root of 12708281 is about 233.3613542312.

The spelling of 12708281 in words is "twelve million, seven hundred eight thousand, two hundred eighty-one".