• 170 can be written using four 4's:
170 is nontrivially palindromic in base 4, base 8, base 13 and base 16.
170 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
170 is an esthetic number in base 2 and base 13, because in such bases its adjacent digits differ by 1.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a magnanimous number.
170 is an undulating number in base 2, base 8 and base 13.
170 is a nontrivial repdigit in base 4 and base 16.
It is a plaindrome in base 4, base 11, base 12 and base 16.
It is a nialpdrome in base 4, base 6, base 7, base 14, base 15 and base 16.
It is a zygodrome in base 4 and base 16.
In principle, a polygon with 170 sides can be constructed with ruler and compass.
170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
170 is a wasteful number, since it uses less digits than its factorization.
170 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 24.
The square root of 170 is about 13.0384048104. The cubic root of 170 is about 5.5396582568.
Subtracting from 170 its reverse (71), we obtain a palindrome (99).