12868657 has 2 divisors, whose sum is σ = 12868658. Its totient is φ = 12868656.

The previous prime is 12868651. The next prime is 12868697. The reversal of 12868657 is 75686821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11128896 + 1739761 = 3336^2 + 1319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12868657 is a prime.

It is not a weakly prime, because it can be changed into another prime (12868651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6434328 + 6434329.

It is an arithmetic number, because the mean of its divisors is an integer number (6434329).

Almost surely, 2^12868657 is an apocalyptic number.

It is an amenable number.

12868657 is a deficient number, since it is larger than the sum of its proper divisors (1).

12868657 is an equidigital number, since it uses as much as digits as its factorization.

12868657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 43.

The square root of 12868657 is about 3587.2910392105. The cubic root of 12868657 is about 234.3389115872.

The spelling of 12868657 in words is "twelve million, eight hundred sixty-eight thousand, six hundred fifty-seven".