198171 has 12 divisors (see below), whose sum is σ = 290472. Its totient is φ = 130176.

The previous prime is 198139. The next prime is 198173. The reversal of 198171 is 171891.

It is not a de Polignac number, because 198171 - 2⁵ = 198139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 760 + ... + 986.

It is an arithmetic number, because the mean of its divisors is an integer number (24206).

2¹⁹⁸¹⁷¹ is an apocalyptic number.

198171 is a deficient number, since it is larger than the sum of its proper divisors (92301).

198171 is a wasteful number, since it uses less digits than its factorization.

198171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 327 counting only the distinct ones).

The product of its digits is 504, while the sum is 27.

The square root of 198171 is about 445.1640147182. The cubic root of 198171 is about 58.3015409526.

The spelling of 198171 in words is "one hundred ninety-eight thousand, one hundred seventy-one".