12871000 has 64 divisors (see below), whose sum is σ = 30756960. Its totient is φ = 5040000.

The previous prime is 12870973. The next prime is 12871009. The reversal of 12871000 is 17821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12871009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60895 + ... + 61105.

Almost surely, 2^12871000 is an apocalyptic number.

12871000 is a gapful number since it is divisible by the number (10) 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 12871000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15378480).

12871000 is an abundant number, since it is smaller than the sum of its proper divisors (17885960).

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

12871000 is a wasteful number, since it uses less digits than its factorization.

12871000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 12871000 is about 3587.6175938915. The cubic root of 12871000 is about 234.3531327747.

Adding to 12871000 its reverse (17821), we get a palindrome (12888821).

The spelling of 12871000 in words is "twelve million, eight hundred seventy-one thousand".