12578717 has 2 divisors, whose sum is σ = 12578718. Its totient is φ = 12578716.

The previous prime is 12578707. The next prime is 12578737. The reversal of 12578717 is 71787521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9803161 + 2775556 = 3131^2 + 1666^2 .

It is a cyclic number.

It is not a de Polignac number, because 12578717 - 2⁴ = 12578701 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12578707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6289358 + 6289359.

It is an arithmetic number, because the mean of its divisors is an integer number (6289359).

Almost surely, 2^12578717 is an apocalyptic number.

It is an amenable number.

12578717 is a deficient number, since it is larger than the sum of its proper divisors (1).

12578717 is an equidigital number, since it uses as much as digits as its factorization.

12578717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27440, while the sum is 38.

The square root of 12578717 is about 3546.6486998292. The cubic root of 12578717 is about 232.5655852282.

The spelling of 12578717 in words is "twelve million, five hundred seventy-eight thousand, seven hundred seventeen".