1143255539 has 2 divisors, whose sum is σ = 1143255540. Its totient is φ = 1143255538.

The previous prime is 1143255499. The next prime is 1143255571. The reversal of 1143255539 is 9355523411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1143255539 - 2⁸ = 1143255283 is a prime.

It is not a weakly prime, because it can be changed into another prime (1143255599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571627769 + 571627770.

It is an arithmetic number, because the mean of its divisors is an integer number (571627770).

Almost surely, 2^1143255539 is an apocalyptic number.

1143255539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143255539 is an equidigital number, since it uses as much as digits as its factorization.

1143255539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81000, while the sum is 38.

The square root of 1143255539 is about 33812.0620341321. The cubic root of 1143255539 is about 1045.6373908088.

The spelling of 1143255539 in words is "one billion, one hundred forty-three million, two hundred fifty-five thousand, five hundred thirty-nine".