12871278 has 64 divisors (see below), whose sum is σ = 34629120. Its totient is φ = 3459456.

The previous prime is 12871259. The next prime is 12871291. The reversal of 12871278 is 87217821.

It is a happy number.

12871278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5425 + ... + 7427.

It is an arithmetic number, because the mean of its divisors is an integer number (541080).

Almost surely, 2^12871278 is an apocalyptic number.

12871278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12871278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17314560).

12871278 is an abundant number, since it is smaller than the sum of its proper divisors (21757842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12871278 is a wasteful number, since it uses less digits than its factorization.

12871278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038 (or 2032 counting only the distinct ones).

The product of its digits is 12544, while the sum is 36.

The square root of 12871278 is about 3587.6563380569. The cubic root of 12871278 is about 234.3548200225.

The spelling of 12871278 in words is "twelve million, eight hundred seventy-one thousand, two hundred seventy-eight".