12868381 has 2 divisors, whose sum is σ = 12868382. Its totient is φ = 12868380.

The previous prime is 12868363. The next prime is 12868393. The reversal of 12868381 is 18386821.

12868381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11799225 + 1069156 = 3435^2 + 1034^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12868381 is a prime.

It is a super-2 number, since 2×12868381² = 331190459122322, 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 12868381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12868321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6434190 + 6434191.

It is an arithmetic number, because the mean of its divisors is an integer number (6434191).

Almost surely, 2^12868381 is an apocalyptic number.

It is an amenable number.

12868381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12868381 is an equidigital number, since it uses as much as digits as its factorization.

12868381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 37.

The square root of 12868381 is about 3587.2525698646. The cubic root of 12868381 is about 234.3372362504.

The spelling of 12868381 in words is "twelve million, eight hundred sixty-eight thousand, three hundred eighty-one".