13805105 has 8 divisors (see below), whose sum is σ = 17540712. Its totient is φ = 10394368.

The previous prime is 13805101. The next prime is 13805117. The reversal of 13805105 is 50150831.

It can be written as a sum of positive squares in 4 ways, for example, as 7890481 + 5914624 = 2809^2 + 2432^2 .

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 13805105 - 2² = 13805101 is a prime.

It is a super-2 number, since 2×13805105² = 381161848122050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13805101) 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 7 ways as a sum of consecutive naturals, for example, 81122 + ... + 81291.

It is an arithmetic number, because the mean of its divisors is an integer number (2192589).

Almost surely, 2^13805105 is an apocalyptic number.

It is an amenable number.

13805105 is a deficient number, since it is larger than the sum of its proper divisors (3735607).

13805105 is a wasteful number, since it uses less digits than its factorization.

13805105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162435.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 13805105 is about 3715.5221705704. The cubic root of 13805105 is about 239.8906040783.

Adding to 13805105 its reverse (50150831), we get a palindrome (63955936).

The spelling of 13805105 in words is "thirteen million, eight hundred five thousand, one hundred five".