1131440403 has 8 divisors (see below), whose sum is σ = 1574178048. Its totient is φ = 721498184.

The previous prime is 1131440399. The next prime is 1131440417. The reversal of 1131440403 is 3040441311.

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 1131440403 - 2² = 1131440399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131440403.

It is not an unprimeable number, because it can be changed into a prime (1131440473) 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 7 ways as a sum of consecutive naturals, for example, 8198775 + ... + 8198912.

It is an arithmetic number, because the mean of its divisors is an integer number (196772256).

Almost surely, 2^1131440403 is an apocalyptic number.

1131440403 is a deficient number, since it is larger than the sum of its proper divisors (442737645).

1131440403 is a wasteful number, since it uses less digits than its factorization.

1131440403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16397713.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1131440403 is about 33636.8905072987. The cubic root of 1131440403 is about 1042.0228144646.

Adding to 1131440403 its reverse (3040441311), we get a palindrome (4171881714).

The spelling of 1131440403 in words is "one billion, one hundred thirty-one million, four hundred forty thousand, four hundred three".