6865871 has 4 divisors (see below), whose sum is σ = 6907152. Its totient is φ = 6824592.

The previous prime is 6865867. The next prime is 6865907. The reversal of 6865871 is 1785686.

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

It is a cyclic number.

It is not a de Polignac number, because 6865871 - 2² = 6865867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6865861) 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, 20390 + ... + 20723.

It is an arithmetic number, because the mean of its divisors is an integer number (1726788).

Almost surely, 2^6865871 is an apocalyptic number.

6865871 is a deficient number, since it is larger than the sum of its proper divisors (41281).

6865871 is a wasteful number, since it uses less digits than its factorization.

6865871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41280.

The product of its digits is 80640, while the sum is 41.

The square root of 6865871 is about 2620.2807101530. The cubic root of 6865871 is about 190.0634229634.

The spelling of 6865871 in words is "six million, eight hundred sixty-five thousand, eight hundred seventy-one".