42641785 has 4 divisors (see below), whose sum is σ = 51170148. Its totient is φ = 34113424.

The previous prime is 42641783. The next prime is 42641801. The reversal of 42641785 is 58714624.

42641785 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 30503529 + 12138256 = 5523^2 + 3484^2 .

It is a cyclic number.

It is not a de Polignac number, because 42641785 - 2¹ = 42641783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42641783) by changing a digit.

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, 4264174 + ... + 4264183.

It is an arithmetic number, because the mean of its divisors is an integer number (12792537).

Almost surely, 2^42641785 is an apocalyptic number.

It is an amenable number.

42641785 is a deficient number, since it is larger than the sum of its proper divisors (8528363).

42641785 is an equidigital number, since it uses as much as digits as its factorization.

42641785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8528362.

The product of its digits is 53760, while the sum is 37.

The square root of 42641785 is about 6530.0677638138. The cubic root of 42641785 is about 349.3642472553.

The spelling of 42641785 in words is "forty-two million, six hundred forty-one thousand, seven hundred eighty-five".