520000 has 70 divisors (see below), whose sum is σ = 1388618. Its totient is φ = 192000.

The previous prime is 519997. The next prime is 520019. The reversal of 520000 is 25.

It can be written as a sum of positive squares in 5 ways, for example, as 304704 + 215296 = 552^2 + 464^2 .

It is a sliding number, since 520000 = 20000 + 500000 and 1/20000 + 1/500000 = 0.0000520000.

It is an Ulam number.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39994 + ... + 40006.

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).

520000 is an abundant number, since it is smaller than the sum of its proper divisors (868618).

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 sum of its prime factors is 45 (or 20 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 7.

The square root of 520000 is about 721.1102550928. The cubic root of 520000 is about 80.4145151718.

Adding to 520000 its reverse (25), we get a palindrome (520025).

It can be divided in two parts, 5 and 20000, that multiplied together give a 5-th power (100000 = 10⁵).

The spelling of 520000 in words is "five hundred twenty thousand".