12871966 has 4 divisors (see below), whose sum is σ = 19307952. Its totient is φ = 6435982.

The previous prime is 12871933. The next prime is 12872003. The reversal of 12871966 is 66917821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66917821 = 1229 ⋅54449.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 as a sum of consecutive naturals, namely, 3217990 + ... + 3217993.

It is an arithmetic number, because the mean of its divisors is an integer number (4826988).

Almost surely, 2^12871966 is an apocalyptic number.

12871966 is a deficient number, since it is larger than the sum of its proper divisors (6435986).

12871966 is an equidigital number, since it uses as much as digits as its factorization.

12871966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6435985.

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

The square root of 12871966 is about 3587.7522210989. The cubic root of 12871966 is about 234.3589955531.

The spelling of 12871966 in words is "twelve million, eight hundred seventy-one thousand, nine hundred sixty-six".