871656 has 16 divisors (see below), whose sum is σ = 2179200. Its totient is φ = 290544.

The previous prime is 871649. The next prime is 871657. The reversal of 871656 is 656178.

871656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (871657) by changing a digit.

871656 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18136 + ... + 18183.

It is an arithmetic number, because the mean of its divisors is an integer number (136200).

2⁸⁷¹⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

871656 is an abundant number, since it is smaller than the sum of its proper divisors (1307544).

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

871656 is a wasteful number, since it uses less digits than its factorization.

871656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36328 (or 36324 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 871656 is about 933.6251924622. The cubic root of 871656 is about 95.5245589826.

The spelling of 871656 in words is "eight hundred seventy-one thousand, six hundred fifty-six".