170985 has 8 divisors (see below), whose sum is σ = 273600. Its totient is φ = 91184.

The previous prime is 170971. The next prime is 171007. The reversal of 170985 is 589071.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 170985 - 2⁵ = 170953 is a prime.

170985 is a lucky number.

It is a zygodrome in base 6.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 170985.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5685 + ... + 5714.

It is an arithmetic number, because the mean of its divisors is an integer number (34200).

2¹⁷⁰⁹⁸⁵ is an apocalyptic number.

170985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

170985 is a deficient number, since it is larger than the sum of its proper divisors (102615).

170985 is a wasteful number, since it uses less digits than its factorization.

170985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11407.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 170985 is about 413.5033252587. The cubic root of 170985 is about 55.5033680287.

The spelling of 170985 in words is "one hundred seventy thousand, nine hundred eighty-five".