It is a nialpdrome in base 16.
It is a self number, because there is not a number n which added to its sum of digits gives 42496.
It is a congruent number.
42496 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
242496 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 42496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42966).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
42496 is an frugal number, since it uses more digits than its factorization.
42496 is an evil number, because the sum of its binary digits is even.
The square root of 42496 is about 206.1455796276. The cubic root of 42496 is about 34.8965653716.
The spelling of 42496 in words is "forty-two thousand, four hundred ninety-six".