42405555 has 16 divisors (see below), whose sum is σ = 68029344. Its totient is φ = 22556160.

The previous prime is 42405527. The next prime is 42405619. The reversal of 42405555 is 55550424.

42405555 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 42405555 - 2⁵ = 42405523 is a prime.

42405555 is a modest number, since divided by 5555 gives 4240 as remainder.

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, 2395 + ... + 9515.

It is an arithmetic number, because the mean of its divisors is an integer number (4251834).

Almost surely, 2^42405555 is an apocalyptic number.

42405555 is a deficient number, since it is larger than the sum of its proper divisors (25623789).

42405555 is a wasteful number, since it uses less digits than its factorization.

42405555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7526.

The product of its (nonzero) digits is 20000, while the sum is 30.

The square root of 42405555 is about 6511.9547756415. The cubic root of 42405555 is about 348.7179079166.

Adding to 42405555 its reverse (55550424), we get a palindrome (97955979).

The spelling of 42405555 in words is "forty-two million, four hundred five thousand, five hundred fifty-five".