171045 has 32 divisors (see below), whose sum is σ = 349440. Its totient is φ = 77760.

The previous prime is 171043. The next prime is 171047. The reversal of 171045 is 540171.

It is an interprime number because it is at equal distance from previous prime (171043) and next prime (171047).

It is not a de Polignac number, because 171045 - 2¹ = 171043 is a prime.

171045 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 855 + ... + 1035.

It is an arithmetic number, because the mean of its divisors is an integer number (10920).

2¹⁷¹⁰⁴⁵ is an apocalyptic number.

171045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

171045 is an abundant number, since it is smaller than the sum of its proper divisors (178395).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171045 is a wasteful number, since it uses less digits than its factorization.

171045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 171045 is about 413.5758697023. The cubic root of 171045 is about 55.5098594609.

The spelling of 171045 in words is "one hundred seventy-one thousand, forty-five".