1242143333 has 2 divisors, whose sum is σ = 1242143334. Its totient is φ = 1242143332.

The previous prime is 1242143327. The next prime is 1242143377. The reversal of 1242143333 is 3333412421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 737556964 + 504586369 = 27158^2 + 22463^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242143333 - 2¹⁶ = 1242077797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242143393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621071666 + 621071667.

It is an arithmetic number, because the mean of its divisors is an integer number (621071667).

Almost surely, 2^1242143333 is an apocalyptic number.

It is an amenable number.

1242143333 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242143333 is an equidigital number, since it uses as much as digits as its factorization.

1242143333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 26.

The square root of 1242143333 is about 35244.0538672838. The cubic root of 1242143333 is about 1074.9557098753.

Adding to 1242143333 its reverse (3333412421), we get a palindrome (4575555754).

The spelling of 1242143333 in words is "one billion, two hundred forty-two million, one hundred forty-three thousand, three hundred thirty-three".