1131243003 has 48 divisors (see below), whose sum is σ = 1868071296. Its totient is φ = 678378240.

The previous prime is 1131242989. The next prime is 1131243023. The reversal of 1131243003 is 3003421311.

It is not a de Polignac number, because 1131243003 - 2¹² = 1131238907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131243023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 257100 + ... + 261462.

It is an arithmetic number, because the mean of its divisors is an integer number (38918152).

Almost surely, 2^1131243003 is an apocalyptic number.

1131243003 is a deficient number, since it is larger than the sum of its proper divisors (736828293).

1131243003 is an equidigital number, since it uses as much as digits as its factorization.

1131243003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4486 (or 4474 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1131243003 is about 33633.9561009406. The cubic root of 1131243003 is about 1041.9622111055.

Adding to 1131243003 its reverse (3003421311), we get a palindrome (4134664314).

The spelling of 1131243003 in words is "one billion, one hundred thirty-one million, two hundred forty-three thousand, three".