84171 has 4 divisors (see below), whose sum is σ = 112232. Its totient is φ = 56112.

The previous prime is 84163. The next prime is 84179. The reversal of 84171 is 17148.

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

It is an interprime number because it is at equal distance from previous prime (84163) and next prime (84179).

It is not a de Polignac number, because 84171 - 2³ = 84163 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84179) 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, 14026 + ... + 14031.

It is an arithmetic number, because the mean of its divisors is an integer number (28058).

2⁸⁴¹⁷¹ is an apocalyptic number.

84171 is a deficient number, since it is larger than the sum of its proper divisors (28061).

84171 is a wasteful number, since it uses less digits than its factorization.

84171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28060.

The product of its digits is 224, while the sum is 21.

The square root of 84171 is about 290.1223879676. The cubic root of 84171 is about 43.8248894213.

The spelling of 84171 in words is "eighty-four thousand, one hundred seventy-one".