1143004561 has 2 divisors, whose sum is σ = 1143004562. Its totient is φ = 1143004560.

The previous prime is 1143004531. The next prime is 1143004589. The reversal of 1143004561 is 1654003411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1034844561 + 108160000 = 32169^2 + 10400^2 .

It is an emirp because it is prime and its reverse (1654003411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1143004561 - 2¹³ = 1142996369 is a prime.

It is not a weakly prime, because it can be changed into another prime (1143004501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571502280 + 571502281.

It is an arithmetic number, because the mean of its divisors is an integer number (571502281).

Almost surely, 2^1143004561 is an apocalyptic number.

It is an amenable number.

1143004561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143004561 is an equidigital number, since it uses as much as digits as its factorization.

1143004561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1143004561 is about 33808.3504625706. The cubic root of 1143004561 is about 1045.5608692210.

Adding to 1143004561 its reverse (1654003411), we get a palindrome (2797007972).

The spelling of 1143004561 in words is "one billion, one hundred forty-three million, four thousand, five hundred sixty-one".