6504865 has 8 divisors (see below), whose sum is σ = 7819560. Its totient is φ = 5194752.

The previous prime is 6504853. The next prime is 6504877. The reversal of 6504865 is 5684056.

It is an interprime number because it is at equal distance from previous prime (6504853) and next prime (6504877).

It can be written as a sum of positive squares in 4 ways, for example, as 314721 + 6190144 = 561^2 + 2488^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6504865 - 2⁷ = 6504737 is a prime.

6504865 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6504865.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4737 + ... + 5953.

It is an arithmetic number, because the mean of its divisors is an integer number (977445).

Almost surely, 2^6504865 is an apocalyptic number.

It is an amenable number.

6504865 is a deficient number, since it is larger than the sum of its proper divisors (1314695).

6504865 is a wasteful number, since it uses less digits than its factorization.

6504865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 6504865 is about 2550.4636833329. The cubic root of 6504865 is about 186.6721069134.

The spelling of 6504865 in words is "six million, five hundred four thousand, eight hundred sixty-five".