281520 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a tau number, because it is divible by the number of its divisors (120).
It is an Ulam number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281520.
281520 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2281520 is an apocalyptic number.
281520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 281520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522288).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
281520 is a wasteful number, since it uses less digits than its factorization.
281520 is an evil number, because the sum of its binary digits is even.
The square root of 281520 is about 530.5845832664. The cubic root of 281520 is about 65.5394940809.
The spelling of 281520 in words is "two hundred eighty-one thousand, five hundred twenty".