12706217 has 2 divisors, whose sum is σ = 12706218. Its totient is φ = 12706216.

The previous prime is 12706171. The next prime is 12706219. The reversal of 12706217 is 71260721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10621081 + 2085136 = 3259^2 + 1444^2 .

It is a cyclic number.

It is not a de Polignac number, because 12706217 - 2⁶ = 12706153 is a prime.

It is a super-2 number, since 2×12706217² = 322895900902178, which contains 22 as substring.

Together with 12706219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12706219) 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, 6353108 + 6353109.

It is an arithmetic number, because the mean of its divisors is an integer number (6353109).

Almost surely, 2^12706217 is an apocalyptic number.

It is an amenable number.

12706217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12706217 is an equidigital number, since it uses as much as digits as its factorization.

12706217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 12706217 is about 3564.5780956517. The cubic root of 12706217 is about 233.3487198470.

Adding to 12706217 its reverse (71260721), we get a palindrome (83966938).

The spelling of 12706217 in words is "twelve million, seven hundred six thousand, two hundred seventeen".