6806545 has 8 divisors (see below), whose sum is σ = 8648424. Its totient is φ = 5124864.

The previous prime is 6806543. The next prime is 6806573. The reversal of 6806545 is 5456086.

It can be written as a sum of positive squares in 4 ways, for example, as 1274641 + 5531904 = 1129^2 + 2352^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6806545 - 2¹ = 6806543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6806545.

It is not an unprimeable number, because it can be changed into a prime (6806543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39954 + ... + 40123.

It is an arithmetic number, because the mean of its divisors is an integer number (1081053).

Almost surely, 2^6806545 is an apocalyptic number.

It is an amenable number.

6806545 is a deficient number, since it is larger than the sum of its proper divisors (1841879).

6806545 is a wasteful number, since it uses less digits than its factorization.

6806545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80099.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 6806545 is about 2608.9356067178. The cubic root of 6806545 is about 189.5144109916.

It can be divided in two parts, 680 and 6545, that added together give a square (7225 = 85²).

The spelling of 6806545 in words is "six million, eight hundred six thousand, five hundred forty-five".