Adding to 504540 its reverse (45405), we get a palindrome (549945).
It is a happy number.
It is a tau number, because it is divible by the number of its divisors (36).
It is a zygodrome in base 3.
It is a congruent number.
504540 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2504540 is an apocalyptic number.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
504540 is a wasteful number, since it uses less digits than its factorization.
504540 is an evil number, because the sum of its binary digits is even.
The square root of 504540 is about 710.3097915698. The cubic root of 504540 is about 79.6095558505.
The spelling of 504540 in words is "five hundred four thousand, five hundred forty".