12886191 has 6 divisors (see below), whose sum is σ = 18613400. Its totient is φ = 8590788.

The previous prime is 12886183. The next prime is 12886213. The reversal of 12886191 is 19168821.

It is not a de Polignac number, because 12886191 - 2³ = 12886183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12886151) 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 in 5 ways as a sum of consecutive naturals, for example, 715891 + ... + 715908.

Almost surely, 2^12886191 is an apocalyptic number.

12886191 is a deficient number, since it is larger than the sum of its proper divisors (5727209).

12886191 is a wasteful number, since it uses less digits than its factorization.

12886191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431805 (or 1431802 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 12886191 is about 3589.7341127164. The cubic root of 12886191 is about 234.4452949680.

The spelling of 12886191 in words is "twelve million, eight hundred eighty-six thousand, one hundred ninety-one".