12671986 has 8 divisors (see below), whose sum is σ = 19084464. Its totient is φ = 6310500.

The previous prime is 12671969. The next prime is 12672007. The reversal of 12671986 is 68917621.

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

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, 12120 + ... + 13123.

It is an arithmetic number, because the mean of its divisors is an integer number (2385558).

Almost surely, 2^12671986 is an apocalyptic number.

12671986 is a deficient number, since it is larger than the sum of its proper divisors (6412478).

12671986 is a wasteful number, since it uses less digits than its factorization.

12671986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25496.

The product of its digits is 36288, while the sum is 40.

The square root of 12671986 is about 3559.7733073891. The cubic root of 12671986 is about 233.1389814728.

The spelling of 12671986 in words is "twelve million, six hundred seventy-one thousand, nine hundred eighty-six".