6865945 has 4 divisors (see below), whose sum is σ = 8239140. Its totient is φ = 5492752.

The previous prime is 6865931. The next prime is 6865949. The reversal of 6865945 is 5495686.

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 755161 + 6110784 = 869^2 + 2472^2 .

It is a cyclic number.

It is not a de Polignac number, because 6865945 - 2¹¹ = 6863897 is a prime.

6865945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6865949) 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, 686590 + ... + 686599.

It is an arithmetic number, because the mean of its divisors is an integer number (2059785).

Almost surely, 2^6865945 is an apocalyptic number.

It is an amenable number.

6865945 is a deficient number, since it is larger than the sum of its proper divisors (1373195).

6865945 is a wasteful number, since it uses less digits than its factorization.

6865945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373194.

The product of its digits is 259200, while the sum is 43.

The square root of 6865945 is about 2620.2948307395. The cubic root of 6865945 is about 190.0641057922.

The spelling of 6865945 in words is "six million, eight hundred sixty-five thousand, nine hundred forty-five".