It is a nialpdrome in base 2, base 4 and base 16.
It is a zygodrome in base 2.
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 65504.
It is an unprimeable number.
265504 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 65504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68040).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
65504 is a wasteful number, since it uses less digits than its factorization.
65504 is an odious number, because the sum of its binary digits is odd.
The square root of 65504 is about 255.9374923687. The cubic root of 65504 is about 40.3109104395.
The spelling of 65504 in words is "sixty-five thousand, five hundred four".