6478513 has 12 divisors (see below), whose sum is σ = 7128540. Its totient is φ = 5879552.

The previous prime is 6478501. The next prime is 6478519. The reversal of 6478513 is 3158746.

It can be written as a sum of positive squares in 6 ways, for example, as 11664 + 6466849 = 108^2 + 2543^2 .

It is not a de Polignac number, because 6478513 - 2⁵ = 6478481 is a prime.

It is a super-2 number, since 2×6478513² = 83942261382338, which contains 22 as substring.

It is a Duffinian number.

6478513 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6478519) 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, 7995 + ... + 8767.

It is an arithmetic number, because the mean of its divisors is an integer number (594045).

Almost surely, 2^6478513 is an apocalyptic number.

It is an amenable number.

6478513 is a deficient number, since it is larger than the sum of its proper divisors (650027).

6478513 is a wasteful number, since it uses less digits than its factorization.

6478513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836 (or 819 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 6478513 is about 2545.2923211293. The cubic root of 6478513 is about 186.4196886035.

The spelling of 6478513 in words is "six million, four hundred seventy-eight thousand, five hundred thirteen".