6445755 has 12 divisors (see below), whose sum is σ = 11172720. Its totient is φ = 3437712.

The previous prime is 6445753. The next prime is 6445757. The reversal of 6445755 is 5575446.

It is a happy number.

6445755 is a `hidden beast` number, since 644 + 5 + 7 + 5 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (6445753) and next prime (6445757).

It is not a de Polignac number, because 6445755 - 2¹ = 6445753 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445753) 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 11 ways as a sum of consecutive naturals, for example, 71575 + ... + 71664.

It is an arithmetic number, because the mean of its divisors is an integer number (931060).

Almost surely, 2^6445755 is an apocalyptic number.

6445755 is a deficient number, since it is larger than the sum of its proper divisors (4726965).

6445755 is a wasteful number, since it uses less digits than its factorization.

6445755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143250 (or 143247 counting only the distinct ones).

The product of its digits is 84000, while the sum is 36.

The square root of 6445755 is about 2538.8491487286. The cubic root of 6445755 is about 186.1049529080.

The spelling of 6445755 in words is "six million, four hundred forty-five thousand, seven hundred fifty-five".