6865439 has 6 divisors (see below), whose sum is σ = 7986384. Its totient is φ = 5884620.

The previous prime is 6865393. The next prime is 6865451. The reversal of 6865439 is 9345686.

It is a de Polignac number, because none of the positive numbers 2^k-6865439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6865396 and 6865405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6865459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70007 + ... + 70104.

It is an arithmetic number, because the mean of its divisors is an integer number (1331064).

Almost surely, 2^6865439 is an apocalyptic number.

6865439 is a deficient number, since it is larger than the sum of its proper divisors (1120945).

6865439 is a wasteful number, since it uses less digits than its factorization.

6865439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140125 (or 140118 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The square root of 6865439 is about 2620.1982749403. The cubic root of 6865439 is about 190.0594366218.

The spelling of 6865439 in words is "six million, eight hundred sixty-five thousand, four hundred thirty-nine".