42405005 has 8 divisors (see below), whose sum is σ = 51411192. Its totient is φ = 33573888.

The previous prime is 42404983. The next prime is 42405023. The reversal of 42405005 is 50050424.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8369449 + 34035556 = 2893^2 + 5834^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42405005 - 2¹⁰ = 42403981 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 7 ways as a sum of consecutive naturals, for example, 43232 + ... + 44201.

It is an arithmetic number, because the mean of its divisors is an integer number (6426399).

Almost surely, 2^42405005 is an apocalyptic number.

It is an amenable number.

42405005 is a deficient number, since it is larger than the sum of its proper divisors (9006187).

42405005 is an equidigital number, since it uses as much as digits as its factorization.

42405005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87535.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 42405005 is about 6511.9125454816. The cubic root of 42405005 is about 348.7164002864.

Adding to 42405005 its reverse (50050424), we get a palindrome (92455429).

The spelling of 42405005 in words is "forty-two million, four hundred five thousand, five".