42445243 has 4 divisors (see below), whose sum is σ = 44942040. Its totient is φ = 39948448.

The previous prime is 42445223. The next prime is 42445279. The reversal of 42445243 is 34254424.

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 42445243 - 2⁵ = 42445211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42445223) 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, 1248373 + ... + 1248406.

It is an arithmetic number, because the mean of its divisors is an integer number (11235510).

Almost surely, 2^42445243 is an apocalyptic number.

42445243 is a deficient number, since it is larger than the sum of its proper divisors (2496797).

42445243 is a wasteful number, since it uses less digits than its factorization.

42445243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2496796.

The product of its digits is 15360, while the sum is 28.

The square root of 42445243 is about 6515.0013814273. The cubic root of 42445243 is about 348.8266641154.

Adding to 42445243 its reverse (34254424), we get a palindrome (76699667).

The spelling of 42445243 in words is "forty-two million, four hundred forty-five thousand, two hundred forty-three".