12686990 has 32 divisors (see below), whose sum is σ = 23514624. Its totient is φ = 4926880.

The previous prime is 12686987. The next prime is 12687001. The reversal of 12686990 is 9968621.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 75887 + ... + 76053.

It is an arithmetic number, because the mean of its divisors is an integer number (734832).

Almost surely, 2^12686990 is an apocalyptic number.

12686990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12686990 is a deficient number, since it is larger than the sum of its proper divisors (10827634).

12686990 is a wasteful number, since it uses less digits than its factorization.

12686990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 12686990 is about 3561.8801215089. The cubic root of 12686990 is about 233.2309596258.

The spelling of 12686990 in words is "twelve million, six hundred eighty-six thousand, nine hundred ninety".