171871 has 8 divisors (see below), whose sum is σ = 201344. Its totient is φ = 143640.

The previous prime is 171869. The next prime is 171877. The reversal of 171871 is 178171.

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

It is not a de Polignac number, because 171871 - 2¹ = 171869 is a prime.

It is a Duffinian number.

171871 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171877) 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 7 ways as a sum of consecutive naturals, for example, 16 + ... + 586.

It is an arithmetic number, because the mean of its divisors is an integer number (25168).

2¹⁷¹⁸⁷¹ is an apocalyptic number.

171871 is a deficient number, since it is larger than the sum of its proper divisors (29473).

171871 is an equidigital number, since it uses as much as digits as its factorization.

171871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621.

The product of its digits is 392, while the sum is 25.

The square root of 171871 is about 414.5732745848. The cubic root of 171871 is about 55.5990709435.

The spelling of 171871 in words is "one hundred seventy-one thousand, eight hundred seventy-one".