6480905 has 4 divisors (see below), whose sum is σ = 7777092. Its totient is φ = 5184720.

The previous prime is 6480869. The next prime is 6480907. The reversal of 6480905 is 5090846.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 797449 + 5683456 = 893^2 + 2384^2 .

It is not a de Polignac number, because 6480905 - 2¹² = 6476809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6480907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648086 + ... + 648095.

It is an arithmetic number, because the mean of its divisors is an integer number (1944273).

Almost surely, 2^6480905 is an apocalyptic number.

It is an amenable number.

6480905 is a deficient number, since it is larger than the sum of its proper divisors (1296187).

6480905 is a wasteful number, since it uses less digits than its factorization.

6480905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296186.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 6480905 is about 2545.7621648536. The cubic root of 6480905 is about 186.4426291057.

The spelling of 6480905 in words is "six million, four hundred eighty thousand, nine hundred five".