12891286 has 8 divisors (see below), whose sum is σ = 19435680. Its totient is φ = 6412728.

The previous prime is 12891259. The next prime is 12891353. The reversal of 12891286 is 68219821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 15966 + ... + 16753.

It is an arithmetic number, because the mean of its divisors is an integer number (2429460).

Almost surely, 2^12891286 is an apocalyptic number.

12891286 is a deficient number, since it is larger than the sum of its proper divisors (6544394).

12891286 is a wasteful number, since it uses less digits than its factorization.

12891286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32918.

The product of its digits is 13824, while the sum is 37.

The square root of 12891286 is about 3590.4437051707. The cubic root of 12891286 is about 234.4761895741.

The spelling of 12891286 in words is "twelve million, eight hundred ninety-one thousand, two hundred eighty-six".