12671878 has 4 divisors (see below), whose sum is σ = 19007820. Its totient is φ = 6335938.

The previous prime is 12671863. The next prime is 12671881. The reversal of 12671878 is 87817621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87817621 = 251 ⋅349871.

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 self number, because there is not a number n which added to its sum of digits gives 12671878.

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, 3167968 + ... + 3167971.

It is an arithmetic number, because the mean of its divisors is an integer number (4751955).

Almost surely, 2^12671878 is an apocalyptic number.

12671878 is a deficient number, since it is larger than the sum of its proper divisors (6335942).

12671878 is an equidigital number, since it uses as much as digits as its factorization.

12671878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6335941.

The product of its digits is 37632, while the sum is 40.

The square root of 12671878 is about 3559.7581378515. The cubic root of 12671878 is about 233.1383191436.

The spelling of 12671878 in words is "twelve million, six hundred seventy-one thousand, eight hundred seventy-eight".