1143275243 has 8 divisors (see below), whose sum is σ = 1270742256. Its totient is φ = 1019730400.

The previous prime is 1143275233. The next prime is 1143275249. The reversal of 1143275243 is 3425723411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1143275243 - 2⁴ = 1143275227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143275249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 979928 + ... + 981093.

It is an arithmetic number, because the mean of its divisors is an integer number (158842782).

Almost surely, 2^1143275243 is an apocalyptic number.

1143275243 is a deficient number, since it is larger than the sum of its proper divisors (127467013).

1143275243 is a wasteful number, since it uses less digits than its factorization.

1143275243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961085.

The product of its digits is 20160, while the sum is 32.

The square root of 1143275243 is about 33812.3534081850. The cubic root of 1143275243 is about 1045.6433979583.

Adding to 1143275243 its reverse (3425723411), we get a palindrome (4568998654).

The spelling of 1143275243 in words is "one billion, one hundred forty-three million, two hundred seventy-five thousand, two hundred forty-three".