871506 has 16 divisors (see below), whose sum is σ = 1936800. Its totient is φ = 290484.

The previous prime is 871477. The next prime is 871513. The reversal of 871506 is 605178.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a plaindrome in base 13 and base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 871506.

It is an unprimeable number.

871506 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 7 ways as a sum of consecutive naturals, for example, 8016 + ... + 8123.

It is an arithmetic number, because the mean of its divisors is an integer number (121050).

2⁸⁷¹⁵⁰⁶ is an apocalyptic number.

871506 is an abundant number, since it is smaller than the sum of its proper divisors (1065294).

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

871506 is a wasteful number, since it uses less digits than its factorization.

871506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16150 (or 16144 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 871506 is about 933.5448569833. The cubic root of 871506 is about 95.5190791810.

The spelling of 871506 in words is "eight hundred seventy-one thousand, five hundred six".