871705 has 8 divisors (see below), whose sum is σ = 1051272. Its totient is φ = 693888.

The previous prime is 871687. The next prime is 871727. The reversal of 871705 is 507178.

It is a happy number.

871705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 63504 + 808201 = 252^2 + 899^2 .

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 871705 - 2¹¹ = 869657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1287 + ... + 1843.

It is an arithmetic number, because the mean of its divisors is an integer number (131409).

2⁸⁷¹⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

871705 is a deficient number, since it is larger than the sum of its proper divisors (179567).

871705 is a wasteful number, since it uses less digits than its factorization.

871705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 871705 is about 933.6514338874. The cubic root of 871705 is about 95.5263489149.

The spelling of 871705 in words is "eight hundred seventy-one thousand, seven hundred five".