Subtracting from 845 its sum of digits (17), we obtain a palindrome (828).
Multipling 845 by its sum of digits (17), we get a triangular number (14365 = T169).
845 is nontrivially palindromic in base 12.
It is a magnanimous number.
It is a Duffinian number.
845 is an undulating number in base 8 and base 12.
It is a plaindrome in base 9, base 14 and base 16.
It is a nialpdrome in base 13.
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 845.
It is an unprimeable number.
It is an amenable number.
845 is a wasteful number, since it uses less digits than its factorization.
845 is an evil number, because the sum of its binary digits is even.
The square root of 845 is about 29.0688837075. The cubic root of 845 is about 9.4540719460.
The spelling of 845 in words is "eight hundred forty-five", and thus it is an aban number.