6404255 has 32 divisors (see below), whose sum is σ = 9253440. Its totient is φ = 4218240.

The previous prime is 6404249. The next prime is 6404261. The reversal of 6404255 is 5524046.

6404255 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6404249) and next prime (6404261).

It is not a de Polignac number, because 6404255 - 2⁴ = 6404239 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 31 ways as a sum of consecutive naturals, for example, 120809 + ... + 120861.

It is an arithmetic number, because the mean of its divisors is an integer number (289170).

Almost surely, 2^6404255 is an apocalyptic number.

6404255 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6404255 is a deficient number, since it is larger than the sum of its proper divisors (2849185).

6404255 is a wasteful number, since it uses less digits than its factorization.

6404255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 6404255 is about 2530.6629566183. The cubic root of 6404255 is about 185.7046899804.

The spelling of 6404255 in words is "six million, four hundred four thousand, two hundred fifty-five".