1105021805 has 8 divisors (see below), whose sum is σ = 1344191352. Its totient is φ = 871907328.

The previous prime is 1105021789. The next prime is 1105021837. The reversal of 1105021805 is 5081205011.

1105021805 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1054729 + 1103967076 = 1027^2 + 33226^2 .

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

It is not a de Polignac number, because 1105021805 - 2⁴ = 1105021789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1513364 + ... + 1514093.

It is an arithmetic number, because the mean of its divisors is an integer number (168023919).

Almost surely, 2^1105021805 is an apocalyptic number.

It is an amenable number.

1105021805 is a deficient number, since it is larger than the sum of its proper divisors (239169547).

1105021805 is an equidigital number, since it uses as much as digits as its factorization.

1105021805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3027535.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 1105021805 is about 33241.8682537549. The cubic root of 1105021805 is about 1033.8486126476.

Adding to 1105021805 its reverse (5081205011), we get a palindrome (6186226816).

The spelling of 1105021805 in words is "one billion, one hundred five million, twenty-one thousand, eight hundred five".