1242216043 has 2 divisors, whose sum is σ = 1242216044. Its totient is φ = 1242216042.

The previous prime is 1242216013. The next prime is 1242216077. The reversal of 1242216043 is 3406122421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1242216043 - 2²⁹ = 705345131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1242215999 and 1242216017.

It is not a weakly prime, because it can be changed into another prime (1242216013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621108021 + 621108022.

It is an arithmetic number, because the mean of its divisors is an integer number (621108022).

Almost surely, 2^1242216043 is an apocalyptic number.

1242216043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242216043 is an equidigital number, since it uses as much as digits as its factorization.

1242216043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1242216043 is about 35245.0853737085. The cubic root of 1242216043 is about 1074.9766839724.

Adding to 1242216043 its reverse (3406122421), we get a palindrome (4648338464).

The spelling of 1242216043 in words is "one billion, two hundred forty-two million, two hundred sixteen thousand, forty-three".