42442505 has 16 divisors (see below), whose sum is σ = 59562624. Its totient is φ = 28425600.

The previous prime is 42442483. The next prime is 42442541. The reversal of 42442505 is 50524424.

42442505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42442505 - 2¹⁰ = 42441481 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12596 + ... + 15605.

It is an arithmetic number, because the mean of its divisors is an integer number (3722664).

Almost surely, 2^42442505 is an apocalyptic number.

It is an amenable number.

42442505 is a deficient number, since it is larger than the sum of its proper divisors (17120119).

42442505 is a wasteful number, since it uses less digits than its factorization.

42442505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28256.

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 42442505 is about 6514.7912476149. The cubic root of 42442505 is about 348.8191634088.

Adding to 42442505 its reverse (50524424), we get a palindrome (92966929).

The spelling of 42442505 in words is "forty-two million, four hundred forty-two thousand, five hundred five".