6478945 has 12 divisors (see below), whose sum is σ = 8546580. Its totient is φ = 4711520.

The previous prime is 6478937. The next prime is 6478949. The reversal of 6478945 is 5498746.

It can be written as a sum of positive squares in 2 ways, for example, as 4648336 + 1830609 = 2156^2 + 1353^2 .

It is not a de Polignac number, because 6478945 - 2³ = 6478937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6478949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4750 + ... + 5959.

It is an arithmetic number, because the mean of its divisors is an integer number (712215).

Almost surely, 2^6478945 is an apocalyptic number.

It is an amenable number.

6478945 is a deficient number, since it is larger than the sum of its proper divisors (2067635).

6478945 is a wasteful number, since it uses less digits than its factorization.

6478945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10736 (or 10725 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 6478945 is about 2545.3771822659. The cubic root of 6478945 is about 186.4238321220.

The spelling of 6478945 in words is "six million, four hundred seventy-eight thousand, nine hundred forty-five".