12756917 has 2 divisors, whose sum is σ = 12756918. Its totient is φ = 12756916.

The previous prime is 12756907. The next prime is 12756929. The reversal of 12756917 is 71965721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7890481 + 4866436 = 2809^2 + 2206^2 .

It is a cyclic number.

It is not a de Polignac number, because 12756917 - 2⁸ = 12756661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12756907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6378458 + 6378459.

It is an arithmetic number, because the mean of its divisors is an integer number (6378459).

Almost surely, 2^12756917 is an apocalyptic number.

It is an amenable number.

12756917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12756917 is an equidigital number, since it uses as much as digits as its factorization.

12756917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 38.

The square root of 12756917 is about 3571.6826566760. The cubic root of 12756917 is about 233.6586751827.

It can be divided in two parts, 1275 and 6917, that added together give a 13-th power (8192 = 2¹³).

The spelling of 12756917 in words is "twelve million, seven hundred fifty-six thousand, nine hundred seventeen".