1145240243 has 16 divisors (see below), whose sum is σ = 1348311744. Its totient is φ = 952197120.

The previous prime is 1145240237. The next prime is 1145240251. The reversal of 1145240243 is 3420425411.

It is not a de Polignac number, because 1145240243 - 2¹⁰ = 1145239219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145240203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80723 + ... + 93843.

It is an arithmetic number, because the mean of its divisors is an integer number (84269484).

Almost surely, 2^1145240243 is an apocalyptic number.

1145240243 is a deficient number, since it is larger than the sum of its proper divisors (203071501).

1145240243 is a wasteful number, since it uses less digits than its factorization.

1145240243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13502.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1145240243 is about 33841.3983605879. The cubic root of 1145240243 is about 1046.2421202838.

Adding to 1145240243 its reverse (3420425411), we get a palindrome (4565665654).

The spelling of 1145240243 in words is "one billion, one hundred forty-five million, two hundred forty thousand, two hundred forty-three".