12861286 has 16 divisors (see below), whose sum is σ = 19729584. Its totient is φ = 6286464.

The previous prime is 12861281. The next prime is 12861287. The reversal of 12861286 is 68216821.

12861286 = T₃₆₃ + T₃₆₄ + ... + T₄₉₉.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12861281) 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 7 ways as a sum of consecutive naturals, for example, 19681 + ... + 20323.

It is an arithmetic number, because the mean of its divisors is an integer number (1233099).

Almost surely, 2^12861286 is an apocalyptic number.

12861286 is a deficient number, since it is larger than the sum of its proper divisors (6868298).

12861286 is a wasteful number, since it uses less digits than its factorization.

12861286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855.

The product of its digits is 9216, while the sum is 34.

The square root of 12861286 is about 3586.2635151366. The cubic root of 12861286 is about 234.2941609444.

The spelling of 12861286 in words is "twelve million, eight hundred sixty-one thousand, two hundred eighty-six".