6520520 has 64 divisors (see below), whose sum is σ = 15966720. Its totient is φ = 2386944.

The previous prime is 6520519. The next prime is 6520541. The reversal of 6520520 is 250256.

It is a happy number.

6520520 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 6520492 and 6520501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29129 + ... + 29351.

It is an arithmetic number, because the mean of its divisors is an integer number (249480).

Almost surely, 2^6520520 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 6520520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7983360).

6520520 is an abundant number, since it is smaller than the sum of its proper divisors (9446200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6520520 is a wasteful number, since it uses less digits than its factorization.

6520520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 6520520 is about 2553.5308887891. The cubic root of 6520520 is about 186.8217390526.

Adding to 6520520 its reverse (250256), we get a palindrome (6770776).

The spelling of 6520520 in words is "six million, five hundred twenty thousand, five hundred twenty".