1143775571 has 2 divisors, whose sum is σ = 1143775572. Its totient is φ = 1143775570.

The previous prime is 1143775519. The next prime is 1143775583. The reversal of 1143775571 is 1755773411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1143775571 - 2¹⁴ = 1143759187 is a prime.

It is not a weakly prime, because it can be changed into another prime (1143775511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571887785 + 571887786.

It is an arithmetic number, because the mean of its divisors is an integer number (571887786).

Almost surely, 2^1143775571 is an apocalyptic number.

1143775571 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143775571 is an equidigital number, since it uses as much as digits as its factorization.

1143775571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102900, while the sum is 41.

The square root of 1143775571 is about 33819.7511966011. The cubic root of 1143775571 is about 1045.7959096055.

The spelling of 1143775571 in words is "one billion, one hundred forty-three million, seven hundred seventy-five thousand, five hundred seventy-one".