1131240443 has 2 divisors, whose sum is σ = 1131240444. Its totient is φ = 1131240442.

The previous prime is 1131240403. The next prime is 1131240511. The reversal of 1131240443 is 3440421311.

It is a weak prime.

It is an emirp because it is prime and its reverse (3440421311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131240443 - 2⁶ = 1131240379 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131240403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565620221 + 565620222.

It is an arithmetic number, because the mean of its divisors is an integer number (565620222).

Almost surely, 2^1131240443 is an apocalyptic number.

1131240443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131240443 is an equidigital number, since it uses as much as digits as its factorization.

1131240443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1131240443 is about 33633.9180441411. The cubic root of 1131240443 is about 1041.9614251189.

Adding to 1131240443 its reverse (3440421311), we get a palindrome (4571661754).

The spelling of 1131240443 in words is "one billion, one hundred thirty-one million, two hundred forty thousand, four hundred forty-three".