171255 has 24 divisors (see below), whose sum is σ = 320112. Its totient is φ = 77952.

The previous prime is 171253. The next prime is 171263. The reversal of 171255 is 552171.

It is not a de Polignac number, because 171255 - 2¹ = 171253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

171255 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 171255.

It is not an unprimeable number, because it can be changed into a prime (171251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 619 + ... + 851.

It is an arithmetic number, because the mean of its divisors is an integer number (13338).

2¹⁷¹²⁵⁵ is an apocalyptic number.

171255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

171255 is a deficient number, since it is larger than the sum of its proper divisors (148857).

171255 is a wasteful number, since it uses less digits than its factorization.

171255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 248 counting only the distinct ones).

The product of its digits is 350, while the sum is 21.

The square root of 171255 is about 413.8296751080. The cubic root of 171255 is about 55.5325675263.

The spelling of 171255 in words is "one hundred seventy-one thousand, two hundred fifty-five".