12861791 has 2 divisors, whose sum is σ = 12861792. Its totient is φ = 12861790.

The previous prime is 12861787. The next prime is 12861817. The reversal of 12861791 is 19716821.

12861791 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12861791 - 2² = 12861787 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 (12861701) 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, 6430895 + 6430896.

It is an arithmetic number, because the mean of its divisors is an integer number (6430896).

Almost surely, 2^12861791 is an apocalyptic number.

12861791 is a deficient number, since it is larger than the sum of its proper divisors (1).

12861791 is an equidigital number, since it uses as much as digits as its factorization.

12861791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 35.

The square root of 12861791 is about 3586.3339219877. Note that the first 3 decimals coincide. The cubic root of 12861791 is about 234.2972274341.

The spelling of 12861791 in words is "twelve million, eight hundred sixty-one thousand, seven hundred ninety-one".