42544445 has 6 divisors (see below), whose sum is σ = 51070842. Its totient is φ = 34023888.

The previous prime is 42544393. The next prime is 42544451. The reversal of 42544445 is 54444524.

42544445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 32741284 + 9803161 = 5722^2 + 3131^2 .

It is not a de Polignac number, because 42544445 - 2¹⁰ = 42543421 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 (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13127 + ... + 16043.

It is an arithmetic number, because the mean of its divisors is an integer number (8511807).

Almost surely, 2^42544445 is an apocalyptic number.

It is an amenable number.

42544445 is a deficient number, since it is larger than the sum of its proper divisors (8526397).

42544445 is an frugal number, since it uses more digits than its factorization.

42544445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5839 (or 2922 counting only the distinct ones).

The product of its digits is 51200, while the sum is 32.

The square root of 42544445 is about 6522.6102903669. The cubic root of 42544445 is about 349.0982091026.

Adding to 42544445 its reverse (54444524), we get a palindrome (96988969).

The spelling of 42544445 in words is "forty-two million, five hundred forty-four thousand, four hundred forty-five".