6478247 has 4 divisors (see below), whose sum is σ = 6495720. Its totient is φ = 6460776.

The previous prime is 6478229. The next prime is 6478267. The reversal of 6478247 is 7428746.

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

It is a cyclic number.

It is not a de Polignac number, because 6478247 - 2¹⁸ = 6216103 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6478247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6478267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8168 + ... + 8925.

It is an arithmetic number, because the mean of its divisors is an integer number (1623930).

Almost surely, 2^6478247 is an apocalyptic number.

6478247 is a deficient number, since it is larger than the sum of its proper divisors (17473).

6478247 is a wasteful number, since it uses less digits than its factorization.

6478247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17472.

The product of its digits is 75264, while the sum is 38.

The square root of 6478247 is about 2545.2400672628. The cubic root of 6478247 is about 186.4171371787.

The spelling of 6478247 in words is "six million, four hundred seventy-eight thousand, two hundred forty-seven".