42885805 has 4 divisors (see below), whose sum is σ = 51462972. Its totient is φ = 34308640.

The previous prime is 42885797. The next prime is 42885811. The reversal of 42885805 is 50858824.

It is a happy number.

42885805 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 17464041 + 25421764 = 4179^2 + 5042^2 .

It is not a de Polignac number, because 42885805 - 2³ = 42885797 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4288576 + ... + 4288585.

It is an arithmetic number, because the mean of its divisors is an integer number (12865743).

Almost surely, 2^42885805 is an apocalyptic number.

It is an amenable number.

42885805 is a deficient number, since it is larger than the sum of its proper divisors (8577167).

42885805 is an equidigital number, since it uses as much as digits as its factorization.

42885805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8577166.

The product of its (nonzero) digits is 102400, while the sum is 40.

The square root of 42885805 is about 6548.7254485129. The cubic root of 42885805 is about 350.0293988911.

The spelling of 42885805 in words is "forty-two million, eight hundred eighty-five thousand, eight hundred five".