12691286 has 8 divisors (see below), whose sum is σ = 19233480. Its totient is φ = 6280128.

The previous prime is 12691247. The next prime is 12691291. The reversal of 12691286 is 68219621.

12691286 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×12691286² = 322137480667592, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32516 + ... + 32903.

It is an arithmetic number, because the mean of its divisors is an integer number (2404185).

Almost surely, 2^12691286 is an apocalyptic number.

12691286 is a deficient number, since it is larger than the sum of its proper divisors (6542194).

12691286 is an equidigital number, since it uses as much as digits as its factorization.

12691286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65518.

The product of its digits is 10368, while the sum is 35.

The square root of 12691286 is about 3562.4831227670. The cubic root of 12691286 is about 233.2572817908.

The spelling of 12691286 in words is "twelve million, six hundred ninety-one thousand, two hundred eighty-six".