1135123443 has 8 divisors (see below), whose sum is σ = 1681664400. Its totient is φ = 756748944.

The previous prime is 1135123433. The next prime is 1135123453. The reversal of 1135123443 is 3443215311.

It is a happy number.

1135123443 is a `hidden beast` number, since 113 + 512 + 34 + 4 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (1135123433) and next prime (1135123453).

It is not a de Polignac number, because 1135123443 - 2¹⁶ = 1135057907 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 42041609 = 1135123443 / (1 + 1 + 3 + 5 + 1 + 2 + 3 + 4 + 4 + 3).

It is not an unprimeable number, because it can be changed into a prime (1135123433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21020778 + ... + 21020831.

It is an arithmetic number, because the mean of its divisors is an integer number (210208050).

Almost surely, 2^1135123443 is an apocalyptic number.

1135123443 is a deficient number, since it is larger than the sum of its proper divisors (546540957).

1135123443 is an equidigital number, since it uses as much as digits as its factorization.

1135123443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42041618 (or 42041612 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1135123443 is about 33691.5930611777. The cubic root of 1135123443 is about 1043.1522464574.

Adding to 1135123443 its reverse (3443215311), we get a palindrome (4578338754).

The spelling of 1135123443 in words is "one billion, one hundred thirty-five million, one hundred twenty-three thousand, four hundred forty-three".