1242143143 has 2 divisors, whose sum is σ = 1242143144. Its totient is φ = 1242143142.

The previous prime is 1242143137. The next prime is 1242143153. The reversal of 1242143143 is 3413412421.

It is a weak prime.

It is an emirp because it is prime and its reverse (3413412421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242143143 - 2⁹ = 1242142631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242143153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621071571 + 621071572.

It is an arithmetic number, because the mean of its divisors is an integer number (621071572).

Almost surely, 2^1242143143 is an apocalyptic number.

1242143143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242143143 is an equidigital number, since it uses as much as digits as its factorization.

1242143143 is an evil number, because the sum of its binary digits is even.

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

The square root of 1242143143 is about 35244.0511717935. The cubic root of 1242143143 is about 1074.9556550664.

Adding to 1242143143 its reverse (3413412421), we get a palindrome (4655555564).

The spelling of 1242143143 in words is "one billion, two hundred forty-two million, one hundred forty-three thousand, one hundred forty-three".