Adding to 520000 its reverse (25), we get a palindrome (520025).
It is an Ulam number.
It is a nialpdrome in base 10.
It is a congruent number.
It is an unprimeable number.
2520000 is an apocalyptic number.
520000 is a gapful number since it is divisible by the number (50) 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 520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (694309).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
520000 is an equidigital number, since it uses as much as digits as its factorization.
520000 is an odious number, because the sum of its binary digits is odd.
The square root of 520000 is about 721.1102550928. The cubic root of 520000 is about 80.4145151718.
The spelling of 520000 in words is "five hundred twenty thousand".