871671 has 4 divisors (see below), whose sum is σ = 1162232. Its totient is φ = 581112.

The previous prime is 871657. The next prime is 871679. The reversal of 871671 is 176178.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 871671 - 2⁵ = 871639 is a prime.

It is a D-number.

It is a Duffinian number.

871671 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145276 + ... + 145281.

It is an arithmetic number, because the mean of its divisors is an integer number (290558).

2⁸⁷¹⁶⁷¹ is an apocalyptic number.

871671 is a deficient number, since it is larger than the sum of its proper divisors (290561).

871671 is a wasteful number, since it uses less digits than its factorization.

871671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290560.

The product of its digits is 2352, while the sum is 30.

The square root of 871671 is about 933.6332256299. The cubic root of 871671 is about 95.5251069282.

The spelling of 871671 in words is "eight hundred seventy-one thousand, six hundred seventy-one".