42445055 has 4 divisors (see below), whose sum is σ = 50934072. Its totient is φ = 33956040.

The previous prime is 42445049. The next prime is 42445057. The reversal of 42445055 is 55054424.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42445055 - 2¹⁸ = 42182911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42445057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4244501 + ... + 4244510.

It is an arithmetic number, because the mean of its divisors is an integer number (12733518).

Almost surely, 2^42445055 is an apocalyptic number.

42445055 is a deficient number, since it is larger than the sum of its proper divisors (8489017).

42445055 is an equidigital number, since it uses as much as digits as its factorization.

42445055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8489016.

The product of its (nonzero) digits is 16000, while the sum is 29.

The square root of 42445055 is about 6514.9869531719. The cubic root of 42445055 is about 348.8261491027.

Adding to 42445055 its reverse (55054424), we get a palindrome (97499479).

The spelling of 42445055 in words is "forty-two million, four hundred forty-five thousand, fifty-five".