171090 has 24 divisors (see below), whose sum is σ = 445068. Its totient is φ = 45600.

The previous prime is 171079. The next prime is 171091. The reversal of 171090 is 90171.

It can be written as a sum of positive squares in 2 ways, for example, as 154449 + 16641 = 393^2 + 129^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (171091) 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, 861 + ... + 1040.

2¹⁷¹⁰⁹⁰ is an apocalyptic number.

171090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

171090 is an abundant number, since it is smaller than the sum of its proper divisors (273978).

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

171090 is a wasteful number, since it uses less digits than its factorization.

171090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914 (or 1911 counting only the distinct ones).

The product of its (nonzero) digits is 63, while the sum is 18.

The square root of 171090 is about 413.6302696854. The cubic root of 171090 is about 55.5147270390.

The spelling of 171090 in words is "one hundred seventy-one thousand, ninety".