42042243 has 4 divisors (see below), whose sum is σ = 56056328. Its totient is φ = 28028160.

The previous prime is 42042227. The next prime is 42042263. The reversal of 42042243 is 34224024.

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

It is not a de Polignac number, because 42042243 - 2⁴ = 42042227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42042263) 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, 7007038 + ... + 7007043.

It is an arithmetic number, because the mean of its divisors is an integer number (14014082).

Almost surely, 2^42042243 is an apocalyptic number.

42042243 is a deficient number, since it is larger than the sum of its proper divisors (14014085).

42042243 is a wasteful number, since it uses less digits than its factorization.

42042243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14014084.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 42042243 is about 6483.9989975323. The cubic root of 42042243 is about 347.7191633711.

Adding to 42042243 its reverse (34224024), we get a palindrome (76266267).

The spelling of 42042243 in words is "forty-two million, forty-two thousand, two hundred forty-three".