42043205 has 4 divisors (see below), whose sum is σ = 50451852. Its totient is φ = 33634560.

The previous prime is 42043201. The next prime is 42043217. The reversal of 42043205 is 50234024.

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 24344356 + 17698849 = 4934^2 + 4207^2 .

It is not a de Polignac number, because 42043205 - 2² = 42043201 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 (42043201) 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, 4204316 + ... + 4204325.

It is an arithmetic number, because the mean of its divisors is an integer number (12612963).

Almost surely, 2^42043205 is an apocalyptic number.

It is an amenable number.

42043205 is a deficient number, since it is larger than the sum of its proper divisors (8408647).

42043205 is an equidigital number, since it uses as much as digits as its factorization.

42043205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8408646.

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

The square root of 42043205 is about 6484.0731797228. The cubic root of 42043205 is about 347.7218154916.

Adding to 42043205 its reverse (50234024), we get a palindrome (92277229).

The spelling of 42043205 in words is "forty-two million, forty-three thousand, two hundred five".