43042123 has 4 divisors (see below), whose sum is σ = 43587040. Its totient is φ = 42497208.

The previous prime is 43042081. The next prime is 43042133. The reversal of 43042123 is 32124034.

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

It is a cyclic number.

It is not a de Polignac number, because 43042123 - 2⁹ = 43041611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43042123.

It is not an unprimeable number, because it can be changed into a prime (43042133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272340 + ... + 272497.

It is an arithmetic number, because the mean of its divisors is an integer number (10896760).

Almost surely, 2^43042123 is an apocalyptic number.

43042123 is a deficient number, since it is larger than the sum of its proper divisors (544917).

43042123 is an equidigital number, since it uses as much as digits as its factorization.

43042123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544916.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 43042123 is about 6560.6495867406. The cubic root of 43042123 is about 350.4541668718.

Adding to 43042123 its reverse (32124034), we get a palindrome (75166157).

The spelling of 43042123 in words is "forty-three million, forty-two thousand, one hundred twenty-three".