42116005 has 4 divisors (see below), whose sum is σ = 50539212. Its totient is φ = 33692800.

The previous prime is 42115961. The next prime is 42116017. The reversal of 42116005 is 50061124.

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 23444964 + 18671041 = 4842^2 + 4321^2 .

It is not a de Polignac number, because 42116005 - 2¹¹ = 42113957 is a prime.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4211596 + ... + 4211605.

It is an arithmetic number, because the mean of its divisors is an integer number (12634803).

Almost surely, 2^42116005 is an apocalyptic number.

It is an amenable number.

42116005 is a deficient number, since it is larger than the sum of its proper divisors (8423207).

42116005 is an equidigital number, since it uses as much as digits as its factorization.

42116005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8423206.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 42116005 is about 6489.6845069695. The cubic root of 42116005 is about 347.9223992426.

Adding to 42116005 its reverse (50061124), we get a palindrome (92177129).

The spelling of 42116005 in words is "forty-two million, one hundred sixteen thousand, five".