1123042043 has 2 divisors, whose sum is σ = 1123042044. Its totient is φ = 1123042042.

The previous prime is 1123041977. The next prime is 1123042057. The reversal of 1123042043 is 3402403211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1123042043 - 2¹⁸ = 1122779899 is a prime.

It is a super-2 number, since 2×1123042043² = 2522446860691227698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1123042073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561521021 + 561521022.

It is an arithmetic number, because the mean of its divisors is an integer number (561521022).

Almost surely, 2^1123042043 is an apocalyptic number.

1123042043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123042043 is an equidigital number, since it uses as much as digits as its factorization.

1123042043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1123042043 is about 33511.8194522470. The cubic root of 1123042043 is about 1039.4381960156.

Adding to 1123042043 its reverse (3402403211), we get a palindrome (4525445254).

The spelling of 1123042043 in words is "one billion, one hundred twenty-three million, forty-two thousand, forty-three".