12586381 has 2 divisors, whose sum is σ = 12586382. Its totient is φ = 12586380.

The previous prime is 12586367. The next prime is 12586393. The reversal of 12586381 is 18368521.

12586381 is digitally balanced in base 3, 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., 10530025 + 2056356 = 3245^2 + 1434^2 .

It is an emirp because it is prime and its reverse (18368521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12586381 - 2⁹ = 12585869 is a prime.

It is a super-2 number, since 2×12586381² = 316833973354322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12586331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6293190 + 6293191.

It is an arithmetic number, because the mean of its divisors is an integer number (6293191).

Almost surely, 2^12586381 is an apocalyptic number.

It is an amenable number.

12586381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12586381 is an equidigital number, since it uses as much as digits as its factorization.

12586381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 34.

The square root of 12586381 is about 3547.7289919045. The cubic root of 12586381 is about 232.6128084009.

The spelling of 12586381 in words is "twelve million, five hundred eighty-six thousand, three hundred eighty-one".