42544205 has 12 divisors (see below), whose sum is σ = 56116956. Its totient is φ = 30940800.

The previous prime is 42544199. The next prime is 42544207. The reversal of 42544205 is 50244524.

It can be written as a sum of positive squares in 2 ways, for example, as 30614089 + 11930116 = 5533^2 + 3454^2 .

It is not a de Polignac number, because 42544205 - 2¹⁸ = 42282061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42544207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34556 + ... + 35765.

It is an arithmetic number, because the mean of its divisors is an integer number (4676413).

Almost surely, 2^42544205 is an apocalyptic number.

It is an amenable number.

42544205 is a deficient number, since it is larger than the sum of its proper divisors (13572751).

42544205 is a wasteful number, since it uses less digits than its factorization.

42544205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70348 (or 70337 counting only the distinct ones).

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

The square root of 42544205 is about 6522.5918927984. The cubic root of 42544205 is about 349.0975526618.

Adding to 42544205 its reverse (50244524), we get a palindrome (92788729).

The spelling of 42544205 in words is "forty-two million, five hundred forty-four thousand, two hundred five".