42043973 has 4 divisors (see below), whose sum is σ = 42147180. Its totient is φ = 41940768.

The previous prime is 42043961. The next prime is 42043993. The reversal of 42043973 is 37934024.

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 22877089 + 19166884 = 4783^2 + 4378^2 .

It is a cyclic number.

It is not a de Polignac number, because 42043973 - 2²⁰ = 40995397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42043913) 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, 50990 + ... + 51807.

It is an arithmetic number, because the mean of its divisors is an integer number (10536795).

Almost surely, 2^42043973 is an apocalyptic number.

It is an amenable number.

42043973 is a deficient number, since it is larger than the sum of its proper divisors (103207).

42043973 is a wasteful number, since it uses less digits than its factorization.

42043973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103206.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 42043973 is about 6484.1324014860. The cubic root of 42043973 is about 347.7239327480.

Adding to 42043973 its reverse (37934024), we get a palindrome (79977997).

The spelling of 42043973 in words is "forty-two million, forty-three thousand, nine hundred seventy-three".