4001105 has 4 divisors (see below), whose sum is σ = 4801332. Its totient is φ = 3200880.

The previous prime is 4001089. The next prime is 4001111. The reversal of 4001105 is 5011004.

4001105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2446096 + 1555009 = 1564^2 + 1247^2 .

It is not a de Polignac number, because 4001105 - 2⁴ = 4001089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 400106 + ... + 400115.

It is an arithmetic number, because the mean of its divisors is an integer number (1200333).

Almost surely, 2^4001105 is an apocalyptic number.

It is an amenable number.

4001105 is a deficient number, since it is larger than the sum of its proper divisors (800227).

4001105 is an equidigital number, since it uses as much as digits as its factorization.

4001105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800226.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 4001105 is about 2000.2762309241. The cubic root of 4001105 is about 158.7547211690.

Adding to 4001105 its reverse (5011004), we get a palindrome (9012109).

The spelling of 4001105 in words is "four million, one thousand, one hundred five".