1131268243 has 6 divisors (see below), whose sum is σ = 1315965156. Its totient is φ = 969658452.

The previous prime is 1131268217. The next prime is 1131268253. The reversal of 1131268243 is 3428621311.

It is not a de Polignac number, because 1131268243 - 2⁵ = 1131268211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131268253) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11543505 + ... + 11543602.

It is an arithmetic number, because the mean of its divisors is an integer number (219327526).

Almost surely, 2^1131268243 is an apocalyptic number.

1131268243 is a deficient number, since it is larger than the sum of its proper divisors (184696913).

1131268243 is an equidigital number, since it uses as much as digits as its factorization.

1131268243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23087121 (or 23087114 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 1131268243 is about 33634.3313148931. The cubic root of 1131268243 is about 1041.9699603779.

Adding to 1131268243 its reverse (3428621311), we get a palindrome (4559889554).

The spelling of 1131268243 in words is "one billion, one hundred thirty-one million, two hundred sixty-eight thousand, two hundred forty-three".