12968281 has 2 divisors, whose sum is σ = 12968282. Its totient is φ = 12968280.

The previous prime is 12968273. The next prime is 12968303. The reversal of 12968281 is 18286921.

12968281 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12960000 + 8281 = 3600^2 + 91^2 .

It is an emirp because it is prime and its reverse (18286921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12968281 - 2³ = 12968273 is a prime.

It is a super-2 number, since 2×12968281² = 336352624189922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12968281.

It is not a weakly prime, because it can be changed into another prime (12968581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6484140 + 6484141.

It is an arithmetic number, because the mean of its divisors is an integer number (6484141).

Almost surely, 2^12968281 is an apocalyptic number.

It is an amenable number.

12968281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12968281 is an equidigital number, since it uses as much as digits as its factorization.

12968281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 37.

The square root of 12968281 is about 3601.1499552226. The cubic root of 12968281 is about 234.9420771684.

It can be divided in two parts, 1296 and 8281, that multiplied together give a square (10732176 = 3276²).

The spelling of 12968281 in words is "twelve million, nine hundred sixty-eight thousand, two hundred eighty-one".