12851717 has 2 divisors, whose sum is σ = 12851718. Its totient is φ = 12851716.

The previous prime is 12851681. The next prime is 12851719. The reversal of 12851717 is 71715821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12397441 + 454276 = 3521^2 + 674^2 .

It is an emirp because it is prime and its reverse (71715821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12851717 - 2¹⁶ = 12786181 is a prime.

Together with 12851719, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12851719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6425858 + 6425859.

It is an arithmetic number, because the mean of its divisors is an integer number (6425859).

Almost surely, 2^12851717 is an apocalyptic number.

It is an amenable number.

12851717 is a deficient number, since it is larger than the sum of its proper divisors (1).

12851717 is an equidigital number, since it uses as much as digits as its factorization.

12851717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3920, while the sum is 32.

The square root of 12851717 is about 3584.9291485328. The cubic root of 12851717 is about 234.2360403419.

The spelling of 12851717 in words is "twelve million, eight hundred fifty-one thousand, seven hundred seventeen".