6445975 has 24 divisors (see below), whose sum is σ = 8771760. Its totient is φ = 4677120.

The previous prime is 6445961. The next prime is 6445981. The reversal of 6445975 is 5795446.

It is not a de Polignac number, because 6445975 - 2⁹ = 6445463 is a prime.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 12064 + ... + 12586.

It is an arithmetic number, because the mean of its divisors is an integer number (365490).

Almost surely, 2^6445975 is an apocalyptic number.

6445975 is a deficient number, since it is larger than the sum of its proper divisors (2325785).

6445975 is a wasteful number, since it uses less digits than its factorization.

6445975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 574 counting only the distinct ones).

The product of its digits is 151200, while the sum is 40.

The square root of 6445975 is about 2538.8924750765. The cubic root of 6445975 is about 186.1070701993.

The spelling of 6445975 in words is "six million, four hundred forty-five thousand, nine hundred seventy-five".