1131440143 has 4 divisors (see below), whose sum is σ = 1133916400. Its totient is φ = 1128963888.

The previous prime is 1131440129. The next prime is 1131440159. The reversal of 1131440143 is 3410441311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131440143 - 2⁵ = 1131440111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131440183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1237443 + ... + 1238356.

It is an arithmetic number, because the mean of its divisors is an integer number (283479100).

Almost surely, 2^1131440143 is an apocalyptic number.

1131440143 is a deficient number, since it is larger than the sum of its proper divisors (2476257).

1131440143 is an equidigital number, since it uses as much as digits as its factorization.

1131440143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476256.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1131440143 is about 33636.8866424941. The cubic root of 1131440143 is about 1042.0227346471.

Adding to 1131440143 its reverse (3410441311), we get a palindrome (4541881454).

The spelling of 1131440143 in words is "one billion, one hundred thirty-one million, four hundred forty thousand, one hundred forty-three".