6857865 has 80 divisors (see below), whose sum is σ = 14636160. Its totient is φ = 3006720.

The previous prime is 6857849. The next prime is 6857881. The reversal of 6857865 is 5687586.

It is an interprime number because it is at equal distance from previous prime (6857849) and next prime (6857881).

It is not a de Polignac number, because 6857865 - 2⁴ = 6857849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6857865.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 116206 + ... + 116264.

It is an arithmetic number, because the mean of its divisors is an integer number (182952).

Almost surely, 2^6857865 is an apocalyptic number.

It is an amenable number.

6857865 is an abundant number, since it is smaller than the sum of its proper divisors (7778295).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6857865 is a wasteful number, since it uses less digits than its factorization.

6857865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 115 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 6857865 is about 2618.7525656312. The cubic root of 6857865 is about 189.9895192741.

The spelling of 6857865 in words is "six million, eight hundred fifty-seven thousand, eight hundred sixty-five".