12686081 has 2 divisors, whose sum is σ = 12686082. Its totient is φ = 12686080.

The previous prime is 12686059. The next prime is 12686111. The reversal of 12686081 is 18068621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12666481 + 19600 = 3559^2 + 140^2 .

It is an emirp because it is prime and its reverse (18068621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12686081 - 2⁶ = 12686017 is a prime.

It is a super-2 number, since 2×12686081² = 321873302277122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12686581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6343040 + 6343041.

It is an arithmetic number, because the mean of its divisors is an integer number (6343041).

Almost surely, 2^12686081 is an apocalyptic number.

It is an amenable number.

12686081 is a deficient number, since it is larger than the sum of its proper divisors (1).

12686081 is an equidigital number, since it uses as much as digits as its factorization.

12686081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 12686081 is about 3561.7525180731. The cubic root of 12686081 is about 233.2253892999.

The spelling of 12686081 in words is "twelve million, six hundred eighty-six thousand, eighty-one".