42209434 has 8 divisors (see below), whose sum is σ = 63454068. Its totient is φ = 21058080.

The previous prime is 42209389. The next prime is 42209441. The reversal of 42209434 is 43490224.

It can be written as a sum of positive squares in 2 ways, for example, as 36905625 + 5303809 = 6075^2 + 2303^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22177 + ... + 24004.

Almost surely, 2^42209434 is an apocalyptic number.

42209434 is a deficient number, since it is larger than the sum of its proper divisors (21244634).

42209434 is a wasteful number, since it uses less digits than its factorization.

42209434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46640.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 42209434 is about 6496.8787890802. The cubic root of 42209434 is about 348.1794830961.

Adding to 42209434 its reverse (43490224), we get a palindrome (85699658).

The spelling of 42209434 in words is "forty-two million, two hundred nine thousand, four hundred thirty-four".