1131035243 has 4 divisors (see below), whose sum is σ = 1218037968. Its totient is φ = 1044032520.

The previous prime is 1131035233. The next prime is 1131035263. The reversal of 1131035243 is 3425301311.

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 1131035243 - 2⁸ = 1131034987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131035233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43501343 + ... + 43501368.

It is an arithmetic number, because the mean of its divisors is an integer number (304509492).

Almost surely, 2^1131035243 is an apocalyptic number.

1131035243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1131035243 is a deficient number, since it is larger than the sum of its proper divisors (87002725).

1131035243 is an equidigital number, since it uses as much as digits as its factorization.

1131035243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87002724.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1131035243 is about 33630.8674137317. The cubic root of 1131035243 is about 1041.8984195292.

Adding to 1131035243 its reverse (3425301311), we get a palindrome (4556336554).

The spelling of 1131035243 in words is "one billion, one hundred thirty-one million, thirty-five thousand, two hundred forty-three".