42434 has 12 divisors (see below), whose sum is σ = 74214. Its totient is φ = 18144.

The previous prime is 42433. The next prime is 42437. The reversal of 42434 is 43424.

It can be written as a sum of positive squares in only one way, i.e., 41209 + 1225 = 203^2 + 35^2 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119 + ... + 314.

2⁴²⁴³⁴ is an apocalyptic number.

42434 is a deficient number, since it is larger than the sum of its proper divisors (31780).

42434 is a wasteful number, since it uses less digits than its factorization.

42434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449 (or 442 counting only the distinct ones).

The product of its digits is 384, while the sum is 17.

The square root of 42434 is about 205.9951455739. The cubic root of 42434 is about 34.8795862042.

Adding to 42434 its reverse (43424), we get a palindrome (85858).

Subtracting 42434 from its reverse (43424), we obtain a triangular number (990 = T₄₄).

The spelling of 42434 in words is "forty-two thousand, four hundred thirty-four".