42243001243 has 4 divisors (see below), whose sum is σ = 42376260240. Its totient is φ = 42109742248.

The previous prime is 42243001219. The next prime is 42243001247. The reversal of 42243001243 is 34210034224.

It is a happy number.

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 42243001243 - 2¹⁷ = 42242870171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42243001247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66629023 + ... + 66629656.

It is an arithmetic number, because the mean of its divisors is an integer number (10594065060).

Almost surely, 2^42243001243 is an apocalyptic number.

42243001243 is a deficient number, since it is larger than the sum of its proper divisors (133258997).

42243001243 is a wasteful number, since it uses less digits than its factorization.

42243001243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133258996.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 42243001243 its reverse (34210034224), we get a palindrome (76453035467).

The spelling of 42243001243 in words is "forty-two billion, two hundred forty-three million, one thousand, two hundred forty-three".