1042443239 has 2 divisors, whose sum is σ = 1042443240. Its totient is φ = 1042443238.

The previous prime is 1042443203. The next prime is 1042443253. The reversal of 1042443239 is 9323442401.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1042443239 is a prime.

It is a super-2 number, since 2×1042443239² = 2173375813073622242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042443289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521221619 + 521221620.

It is an arithmetic number, because the mean of its divisors is an integer number (521221620).

Almost surely, 2^1042443239 is an apocalyptic number.

1042443239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042443239 is an equidigital number, since it uses as much as digits as its factorization.

1042443239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 1042443239 is about 32286.8895838543. The cubic root of 1042443239 is about 1013.9521777440.

The spelling of 1042443239 in words is "one billion, forty-two million, four hundred forty-three thousand, two hundred thirty-nine".