6520856 has 16 divisors (see below), whose sum is σ = 12265440. Its totient is φ = 3250080.

The previous prime is 6520847. The next prime is 6520867. The reversal of 6520856 is 6580256.

It is a happy number.

It is a plaindrome in base 12.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1826 + ... + 4046.

It is an arithmetic number, because the mean of its divisors is an integer number (766590).

Almost surely, 2^6520856 is an apocalyptic number.

It is an amenable number.

6520856 is a deficient number, since it is larger than the sum of its proper divisors (5744584).

6520856 is a wasteful number, since it uses less digits than its factorization.

6520856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594 (or 2590 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 6520856 is about 2553.5966791958. The cubic root of 6520856 is about 186.8249479493.

The spelling of 6520856 in words is "six million, five hundred twenty thousand, eight hundred fifty-six".