11805305 has 8 divisors (see below), whose sum is σ = 14185800. Its totient is φ = 9431296.

The previous prime is 11805271. The next prime is 11805307. The reversal of 11805305 is 50350811.

It can be written as a sum of positive squares in 4 ways, for example, as 218089 + 11587216 = 467^2 + 3404^2 .

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 11805305 - 2²⁰ = 10756729 is a prime.

It is a super-2 number, since 2×11805305² = 278730452286050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11805307) 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, 4481 + ... + 6609.

It is an arithmetic number, because the mean of its divisors is an integer number (1773225).

Almost surely, 2^11805305 is an apocalyptic number.

It is an amenable number.

11805305 is a deficient number, since it is larger than the sum of its proper divisors (2380495).

11805305 is a wasteful number, since it uses less digits than its factorization.

11805305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3243.

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

The square root of 11805305 is about 3435.8848932990. The cubic root of 11805305 is about 227.6979238006.

The spelling of 11805305 in words is "eleven million, eight hundred five thousand, three hundred five".