171081 has 6 divisors (see below), whose sum is σ = 247130. Its totient is φ = 114048.

The previous prime is 171079. The next prime is 171091. The reversal of 171081 is 180171.

It can be written as a sum of positive squares in only one way, i.e., 164025 + 7056 = 405^2 + 84^2 .

It is not a de Polignac number, because 171081 - 2¹ = 171079 is a prime.

It is a super-2 number, since 2×171081² = 58537417122, which contains 22 as substring.

It is a Duffinian number.

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 5 ways as a sum of consecutive naturals, for example, 9496 + ... + 9513.

2¹⁷¹⁰⁸¹ is an apocalyptic number.

It is an amenable number.

171081 is a deficient number, since it is larger than the sum of its proper divisors (76049).

171081 is a wasteful number, since it uses less digits than its factorization.

171081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19015 (or 19012 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 18.

The square root of 171081 is about 413.6193902611. The cubic root of 171081 is about 55.5137535917.

The spelling of 171081 in words is "one hundred seventy-one thousand, eighty-one".