12871992 has 64 divisors (see below), whose sum is σ = 38949120. Its totient is φ = 3460608.

The previous prime is 12871933. The next prime is 12872003. The reversal of 12871992 is 29917821.

Its product of digits (18144) is a multiple of the sum of its prime divisors (4536).

It is a self number, because there is not a number n which added to its sum of digits gives 12871992.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 603 + ... + 5109.

It is an arithmetic number, because the mean of its divisors is an integer number (608580).

Almost surely, 2^12871992 is an apocalyptic number.

12871992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12871992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19474560).

12871992 is an abundant number, since it is smaller than the sum of its proper divisors (26077128).

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

12871992 is a wasteful number, since it uses less digits than its factorization.

12871992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540 (or 4536 counting only the distinct ones).

The product of its digits is 18144, while the sum is 39.

The square root of 12871992 is about 3587.7558445357. The cubic root of 12871992 is about 234.3591533464.

The spelling of 12871992 in words is "twelve million, eight hundred seventy-one thousand, nine hundred ninety-two".