6397855 has 8 divisors (see below), whose sum is σ = 7885152. Its totient is φ = 4979808.

The previous prime is 6397849. The next prime is 6397871. The reversal of 6397855 is 5587936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6397855 - 2⁵ = 6397823 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17107 + ... + 17476.

It is an arithmetic number, because the mean of its divisors is an integer number (985644).

Almost surely, 2^6397855 is an apocalyptic number.

6397855 is a deficient number, since it is larger than the sum of its proper divisors (1487297).

6397855 is a wasteful number, since it uses less digits than its factorization.

6397855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34625.

The product of its digits is 226800, while the sum is 43.

The square root of 6397855 is about 2529.3981497582. The cubic root of 6397855 is about 185.6428089267.

The spelling of 6397855 in words is "six million, three hundred ninety-seven thousand, eight hundred fifty-five".