170871 has 4 divisors (see below), whose sum is σ = 227832. Its totient is φ = 113912.

The previous prime is 170857. The next prime is 170873. The reversal of 170871 is 178071.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178071 = 3 ⋅59357.

It is a cyclic number.

It is not a de Polignac number, because 170871 - 2¹⁴ = 154487 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28476 + ... + 28481.

It is an arithmetic number, because the mean of its divisors is an integer number (56958).

2¹⁷⁰⁸⁷¹ is an apocalyptic number.

170871 is a deficient number, since it is larger than the sum of its proper divisors (56961).

170871 is an equidigital number, since it uses as much as digits as its factorization.

170871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56960.

The product of its (nonzero) digits is 392, while the sum is 24.

The square root of 170871 is about 413.3654557410. The cubic root of 170871 is about 55.4910301225.

The spelling of 170871 in words is "one hundred seventy thousand, eight hundred seventy-one".