12878017 has 2 divisors, whose sum is σ = 12878018. Its totient is φ = 12878016.

The previous prime is 12877981. The next prime is 12878039. The reversal of 12878017 is 71087821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10699441 + 2178576 = 3271^2 + 1476^2 .

It is a cyclic number.

It is not a de Polignac number, because 12878017 - 2¹¹ = 12875969 is a prime.

It is not a weakly prime, because it can be changed into another prime (12870017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6439008 + 6439009.

It is an arithmetic number, because the mean of its divisors is an integer number (6439009).

Almost surely, 2^12878017 is an apocalyptic number.

It is an amenable number.

12878017 is a deficient number, since it is larger than the sum of its proper divisors (1).

12878017 is an equidigital number, since it uses as much as digits as its factorization.

12878017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 12878017 is about 3588.5954076769. The cubic root of 12878017 is about 234.3957131798.

The spelling of 12878017 in words is "twelve million, eight hundred seventy-eight thousand, seventeen".