11805043 has 4 divisors (see below), whose sum is σ = 11826360. Its totient is φ = 11783728.

The previous prime is 11805019. The next prime is 11805047. The reversal of 11805043 is 34050811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11805043 - 2⁵ = 11805011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11805047) 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 3 ways as a sum of consecutive naturals, for example, 9805 + ... + 10942.

It is an arithmetic number, because the mean of its divisors is an integer number (2956590).

Almost surely, 2^11805043 is an apocalyptic number.

11805043 is a deficient number, since it is larger than the sum of its proper divisors (21317).

11805043 is an equidigital number, since it uses as much as digits as its factorization.

11805043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21316.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 11805043 is about 3435.8467660826. The cubic root of 11805043 is about 227.6962393235.

Adding to 11805043 its reverse (34050811), we get a palindrome (45855854).

The spelling of 11805043 in words is "eleven million, eight hundred five thousand, forty-three".