42505055 has 4 divisors (see below), whose sum is σ = 51006072. Its totient is φ = 34004040.

The previous prime is 42505051. The next prime is 42505103. The reversal of 42505055 is 55050524.

42505055 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 is not a de Polignac number, because 42505055 - 2² = 42505051 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42505051) 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, 4250501 + ... + 4250510.

It is an arithmetic number, because the mean of its divisors is an integer number (12751518).

Almost surely, 2^42505055 is an apocalyptic number.

42505055 is a deficient number, since it is larger than the sum of its proper divisors (8501017).

42505055 is an equidigital number, since it uses as much as digits as its factorization.

42505055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8501016.

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 42505055 is about 6519.5900944768. The cubic root of 42505055 is about 348.9904376928.

Adding to 42505055 its reverse (55050524), we get a palindrome (97555579).

The spelling of 42505055 in words is "forty-two million, five hundred five thousand, fifty-five".