12887131 has 2 divisors, whose sum is σ = 12887132. Its totient is φ = 12887130.

The previous prime is 12887123. The next prime is 12887167. The reversal of 12887131 is 13178821.

It is a happy number.

12887131 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12887131 - 2³ = 12887123 is a prime.

It is a super-2 number, since 2×12887131² = 332156290822322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12887093 and 12887102.

It is not a weakly prime, because it can be changed into another prime (12887101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6443565 + 6443566.

It is an arithmetic number, because the mean of its divisors is an integer number (6443566).

Almost surely, 2^12887131 is an apocalyptic number.

12887131 is a deficient number, since it is larger than the sum of its proper divisors (1).

12887131 is an equidigital number, since it uses as much as digits as its factorization.

12887131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 31.

The square root of 12887131 is about 3589.8650392459. The cubic root of 12887131 is about 234.4509954686.

The spelling of 12887131 in words is "twelve million, eight hundred eighty-seven thousand, one hundred thirty-one".