12861186 has 64 divisors (see below), whose sum is σ = 29611008. Its totient is φ = 3693888.

The previous prime is 12861169. The next prime is 12861203. The reversal of 12861186 is 68116821.

It is an interprime number because it is at equal distance from previous prime (12861169) and next prime (12861203).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120145 + ... + 120251.

It is an arithmetic number, because the mean of its divisors is an integer number (462672).

Almost surely, 2^12861186 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12861186, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14805504).

12861186 is an abundant number, since it is smaller than the sum of its proper divisors (16749822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12861186 is a wasteful number, since it uses less digits than its factorization.

12861186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215.

The product of its digits is 4608, while the sum is 33.

The square root of 12861186 is about 3586.2495730219. The cubic root of 12861186 is about 234.2935537092.

The spelling of 12861186 in words is "twelve million, eight hundred sixty-one thousand, one hundred eighty-six".