12742817 has 2 divisors, whose sum is σ = 12742818. Its totient is φ = 12742816.

The previous prime is 12742811. The next prime is 12742819. The reversal of 12742817 is 71824721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8059921 + 4682896 = 2839^2 + 2164^2 .

It is a cyclic number.

It is not a de Polignac number, because 12742817 - 2⁴ = 12742801 is a prime.

Together with 12742819, 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 (12742811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6371408 + 6371409.

It is an arithmetic number, because the mean of its divisors is an integer number (6371409).

Almost surely, 2^12742817 is an apocalyptic number.

It is an amenable number.

12742817 is a deficient number, since it is larger than the sum of its proper divisors (1).

12742817 is an equidigital number, since it uses as much as digits as its factorization.

12742817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 32.

The square root of 12742817 is about 3569.7082513841. The cubic root of 12742817 is about 233.5725571475.

The spelling of 12742817 in words is "twelve million, seven hundred forty-two thousand, eight hundred seventeen".