42430205 has 4 divisors (see below), whose sum is σ = 50916252. Its totient is φ = 33944160.

The previous prime is 42430139. The next prime is 42430253. The reversal of 42430205 is 50203424.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29997529 + 12432676 = 5477^2 + 3526^2 .

It is not a de Polignac number, because 42430205 - 2¹⁴ = 42413821 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4243016 + ... + 4243025.

It is an arithmetic number, because the mean of its divisors is an integer number (12729063).

Almost surely, 2^42430205 is an apocalyptic number.

It is an amenable number.

42430205 is a deficient number, since it is larger than the sum of its proper divisors (8486047).

42430205 is an equidigital number, since it uses as much as digits as its factorization.

42430205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8486046.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 42430205 is about 6513.8471735220. The cubic root of 42430205 is about 348.7854637780.

Adding to 42430205 its reverse (50203424), we get a palindrome (92633629).

The spelling of 42430205 in words is "forty-two million, four hundred thirty thousand, two hundred five".