12800861 has 12 divisors (see below), whose sum is σ = 13713024. Its totient is φ = 11936400.

The previous prime is 12800849. The next prime is 12800891. The reversal of 12800861 is 16800821.

12800861 is nontrivially palindromic in base 11.

It is not a de Polignac number, because 12800861 - 2⁶ = 12800797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12800861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12800831) 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 in 11 ways as a sum of consecutive naturals, for example, 25826 + ... + 26316.

It is an arithmetic number, because the mean of its divisors is an integer number (1142752).

Almost surely, 2^12800861 is an apocalyptic number.

It is an amenable number.

12800861 is a deficient number, since it is larger than the sum of its proper divisors (912163).

12800861 is an equidigital number, since it uses as much as digits as its factorization.

12800861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 12800861 is about 3577.8290903843. The cubic root of 12800861 is about 233.9266638962.

The spelling of 12800861 in words is "twelve million, eight hundred thousand, eight hundred sixty-one".