12887657 has 2 divisors, whose sum is σ = 12887658. Its totient is φ = 12887656.

The previous prime is 12887627. The next prime is 12887713. The reversal of 12887657 is 75678821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10118761 + 2768896 = 3181^2 + 1664^2 .

It is a cyclic number.

It is not a de Polignac number, because 12887657 - 2¹² = 12883561 is a prime.

It is not a weakly prime, because it can be changed into another prime (12887617) 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, 6443828 + 6443829.

It is an arithmetic number, because the mean of its divisors is an integer number (6443829).

Almost surely, 2^12887657 is an apocalyptic number.

It is an amenable number.

12887657 is a deficient number, since it is larger than the sum of its proper divisors (1).

12887657 is an equidigital number, since it uses as much as digits as its factorization.

12887657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 44.

The square root of 12887657 is about 3589.9383003055. The cubic root of 12887657 is about 234.4541852022.

The spelling of 12887657 in words is "twelve million, eight hundred eighty-seven thousand, six hundred fifty-seven".