12678871 has 4 divisors (see below), whose sum is σ = 13346200. Its totient is φ = 12011544.

The previous prime is 12678863. The next prime is 12678893. The reversal of 12678871 is 17887621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12678871 - 2³ = 12678863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12678271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333636 + ... + 333673.

It is an arithmetic number, because the mean of its divisors is an integer number (3336550).

Almost surely, 2^12678871 is an apocalyptic number.

12678871 is a deficient number, since it is larger than the sum of its proper divisors (667329).

12678871 is an equidigital number, since it uses as much as digits as its factorization.

12678871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667328.

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

The square root of 12678871 is about 3560.7402320304. The cubic root of 12678871 is about 233.1811971989.

The spelling of 12678871 in words is "twelve million, six hundred seventy-eight thousand, eight hundred seventy-one".