6870865 has 4 divisors (see below), whose sum is σ = 8245044. Its totient is φ = 5496688.

The previous prime is 6870847. The next prime is 6870869. The reversal of 6870865 is 5680786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5680786 = 2 ⋅2840393.

It can be written as a sum of positive squares in 2 ways, for example, as 4210704 + 2660161 = 2052^2 + 1631^2 .

It is a cyclic number.

It is not a de Polignac number, because 6870865 - 2¹¹ = 6868817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6870869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687082 + ... + 687091.

It is an arithmetic number, because the mean of its divisors is an integer number (2061261).

Almost surely, 2^6870865 is an apocalyptic number.

It is an amenable number.

6870865 is a deficient number, since it is larger than the sum of its proper divisors (1374179).

6870865 is a wasteful number, since it uses less digits than its factorization.

6870865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374178.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 6870865 is about 2621.2334882646. The cubic root of 6870865 is about 190.1094936753.

The spelling of 6870865 in words is "six million, eight hundred seventy thousand, eight hundred sixty-five".