671871 has 8 divisors (see below), whose sum is σ = 900144. Its totient is φ = 445760.

The previous prime is 671851. The next prime is 671887. The reversal of 671871 is 178176.

671871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 671871 - 2⁷ = 671743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445 + ... + 1241.

It is an arithmetic number, because the mean of its divisors is an integer number (112518).

2⁶⁷¹⁸⁷¹ is an apocalyptic number.

671871 is a deficient number, since it is larger than the sum of its proper divisors (228273).

671871 is a wasteful number, since it uses less digits than its factorization.

671871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081.

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

The square root of 671871 is about 819.6773755570. The cubic root of 671871 is about 87.5847776973.

The spelling of 671871 in words is "six hundred seventy-one thousand, eight hundred seventy-one".