6395881 has 4 divisors (see below), whose sum is σ = 6516612. Its totient is φ = 6275152.

The previous prime is 6395869. The next prime is 6395891. The reversal of 6395881 is 1885936.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5569600 + 826281 = 2360^2 + 909^2 .

It is a cyclic number.

It is not a de Polignac number, because 6395881 - 2⁹ = 6395369 is a prime.

It is a super-2 number, since 2×6395881² = 81814587532322, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (6395801) 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 3 ways as a sum of consecutive naturals, for example, 60286 + ... + 60391.

It is an arithmetic number, because the mean of its divisors is an integer number (1629153).

Almost surely, 2^6395881 is an apocalyptic number.

It is an amenable number.

6395881 is a deficient number, since it is larger than the sum of its proper divisors (120731).

6395881 is a wasteful number, since it uses less digits than its factorization.

6395881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120730.

The product of its digits is 51840, while the sum is 40.

The square root of 6395881 is about 2529.0079082518. The cubic root of 6395881 is about 185.6237141624.

Subtracting from 6395881 its sum of digits (40), we obtain a square (6395841 = 2529²).

The spelling of 6395881 in words is "six million, three hundred ninety-five thousand, eight hundred eighty-one".