43042 has 4 divisors (see below), whose sum is σ = 64566. Its totient is φ = 21520.

The previous prime is 43037. The next prime is 43049. The reversal of 43042 is 24034.

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

It can be written as a sum of positive squares in only one way, i.e., 36481 + 6561 = 191^2 + 81^2 .

It is a super-2 number, since 2×43042² = 3705227528, which contains 22 as substring.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 13.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (43049) by changing a digit.

43042 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10759 + ... + 10762.

2⁴³⁰⁴² is an apocalyptic number.

43042 is a deficient number, since it is larger than the sum of its proper divisors (21524).

43042 is a wasteful number, since it uses less digits than its factorization.

43042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21523.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 43042 is about 207.4656598090. The cubic root of 43042 is about 35.0453833045.

Adding to 43042 its reverse (24034), we get a palindrome (67076).

The spelling of 43042 in words is "forty-three thousand, forty-two", and thus it is an iban number.