6399875 has 8 divisors (see below), whose sum is σ = 7987200. Its totient is φ = 5119800.

The previous prime is 6399859. The next prime is 6399889. The reversal of 6399875 is 5789936.

It is not a de Polignac number, because 6399875 - 2⁴ = 6399859 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 25475 + ... + 25724.

It is an arithmetic number, because the mean of its divisors is an integer number (998400).

Almost surely, 2^6399875 is an apocalyptic number.

6399875 is a deficient number, since it is larger than the sum of its proper divisors (1587325).

6399875 is an equidigital number, since it uses as much as digits as its factorization.

6399875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51214 (or 51204 counting only the distinct ones).

The product of its digits is 408240, while the sum is 47.

The square root of 6399875 is about 2529.7974227199. The cubic root of 6399875 is about 185.6623445895.

The spelling of 6399875 in words is "six million, three hundred ninety-nine thousand, eight hundred seventy-five".