170165 has 4 divisors (see below), whose sum is σ = 204204. Its totient is φ = 136128.

The previous prime is 170141. The next prime is 170167. The reversal of 170165 is 561071.

170165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 561071 = 7 ⋅80153.

It can be written as a sum of positive squares in 2 ways, for example, as 91204 + 78961 = 302^2 + 281^2 .

It is a cyclic number.

It is not a de Polignac number, because 170165 - 2⁶ = 170101 is a prime.

It is a super-2 number, since 2×170165² = 57912254450, which contains 22 as substring.

It is a Duffinian 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 170165.

It is not an unprimeable number, because it can be changed into a prime (170167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17012 + ... + 17021.

It is an arithmetic number, because the mean of its divisors is an integer number (51051).

2¹⁷⁰¹⁶⁵ is an apocalyptic number.

It is an amenable number.

170165 is a deficient number, since it is larger than the sum of its proper divisors (34039).

170165 is an equidigital number, since it uses as much as digits as its factorization.

170165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34038.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 170165 is about 412.5106059243. The cubic root of 170165 is about 55.4144991960.

The spelling of 170165 in words is "one hundred seventy thousand, one hundred sixty-five".