12261686 has 8 divisors (see below), whose sum is σ = 18431760. Its totient is φ = 6117768.

The previous prime is 12261677. The next prime is 12261701. The reversal of 12261686 is 68616221.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5321 + ... + 7268.

It is an arithmetic number, because the mean of its divisors is an integer number (2303970).

Almost surely, 2^12261686 is an apocalyptic number.

12261686 is a deficient number, since it is larger than the sum of its proper divisors (6170074).

12261686 is a wasteful number, since it uses less digits than its factorization.

12261686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13078.

The product of its digits is 6912, while the sum is 32.

The square root of 12261686 is about 3501.6690306195. The cubic root of 12261686 is about 230.5950941067.

The spelling of 12261686 in words is "twelve million, two hundred sixty-one thousand, six hundred eighty-six".