6805105 has 4 divisors (see below), whose sum is σ = 8166132. Its totient is φ = 5444080.

The previous prime is 6805069. The next prime is 6805109. The reversal of 6805105 is 5015086.

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 1216609 + 5588496 = 1103^2 + 2364^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6805105 is a prime.

It is a super-2 number, since 2×6805105² = 92618908122050, which contains 22 as substring.

It is an Ulam number.

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 6805105.

It is not an unprimeable number, because it can be changed into a prime (6805109) 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, 680506 + ... + 680515.

It is an arithmetic number, because the mean of its divisors is an integer number (2041533).

Almost surely, 2^6805105 is an apocalyptic number.

It is an amenable number.

6805105 is a deficient number, since it is larger than the sum of its proper divisors (1361027).

6805105 is a wasteful number, since it uses less digits than its factorization.

6805105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361026.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 6805105 is about 2608.6596175047. The cubic root of 6805105 is about 189.5010454246.

The spelling of 6805105 in words is "six million, eight hundred five thousand, one hundred five".