871085 has 8 divisors (see below), whose sum is σ = 1058400. Its totient is φ = 688144.

The previous prime is 871061. The next prime is 871103. The reversal of 871085 is 580178.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 871085 - 2⁶ = 871021 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635 + ... + 1464.

It is an arithmetic number, because the mean of its divisors is an integer number (132300).

2⁸⁷¹⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

871085 is a deficient number, since it is larger than the sum of its proper divisors (187315).

871085 is a wasteful number, since it uses less digits than its factorization.

871085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 871085 is about 933.3193451333. The cubic root of 871085 is about 95.5036958448.

It can be divided in two parts, 87 and 1085, that multiplied together give a triangular number (94395 = T₄₃₄).

The spelling of 871085 in words is "eight hundred seventy-one thousand, eighty-five".