6520871 has 12 divisors (see below), whose sum is σ = 7693632. Its totient is φ = 5509728.

The previous prime is 6520867. The next prime is 6520883. The reversal of 6520871 is 1780256.

It is not a de Polignac number, because 6520871 - 2² = 6520867 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6520831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2666 + ... + 4488.

It is an arithmetic number, because the mean of its divisors is an integer number (641136).

Almost surely, 2^6520871 is an apocalyptic number.

6520871 is a deficient number, since it is larger than the sum of its proper divisors (1172761).

6520871 is a wasteful number, since it uses less digits than its factorization.

6520871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910 (or 1903 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 6520871 is about 2553.5996162280. The cubic root of 6520871 is about 186.8250912011.

The spelling of 6520871 in words is "six million, five hundred twenty thousand, eight hundred seventy-one".