42030001243 has 2 divisors, whose sum is σ = 42030001244. Its totient is φ = 42030001242.

The previous prime is 42030001241. The next prime is 42030001249. The reversal of 42030001243 is 34210003024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42030001243 - 2¹ = 42030001241 is a prime.

Together with 42030001241, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 42030001243.

It is not a weakly prime, because it can be changed into another prime (42030001241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21015000621 + 21015000622.

It is an arithmetic number, because the mean of its divisors is an integer number (21015000622).

Almost surely, 2^42030001243 is an apocalyptic number.

42030001243 is a deficient number, since it is larger than the sum of its proper divisors (1).

42030001243 is an equidigital number, since it uses as much as digits as its factorization.

42030001243 is an evil number, because the sum of its binary digits is even.

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

Adding to 42030001243 its reverse (34210003024), we get a palindrome (76240004267).

The spelling of 42030001243 in words is "forty-two billion, thirty million, one thousand, two hundred forty-three".