6405255 has 24 divisors (see below), whose sum is σ = 11405472. Its totient is φ = 3322944.

The previous prime is 6405221. The next prime is 6405263. The reversal of 6405255 is 5525046.

6405255 is a `hidden beast` number, since 6 + 405 + 255 = 666.

6405255 is nontrivially palindromic in base 6.

6405255 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6405255 - 2⁹ = 6404743 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 259 + ... + 3588.

It is an arithmetic number, because the mean of its divisors is an integer number (475228).

Almost surely, 2^6405255 is an apocalyptic number.

6405255 is a deficient number, since it is larger than the sum of its proper divisors (5000217).

6405255 is a wasteful number, since it uses less digits than its factorization.

6405255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3895 (or 3892 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 6405255 is about 2530.8605255920. The cubic root of 6405255 is about 185.7143551704.

The spelling of 6405255 in words is "six million, four hundred five thousand, two hundred fifty-five".