1123242305 has 4 divisors (see below), whose sum is σ = 1347890772. Its totient is φ = 898593840.

The previous prime is 1123242287. The next prime is 1123242317. The reversal of 1123242305 is 5032423211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 332114176 + 791128129 = 18224^2 + 28127^2 .

It is not a de Polignac number, because 1123242305 - 2¹⁰ = 1123241281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 112324226 + ... + 112324235.

It is an arithmetic number, because the mean of its divisors is an integer number (336972693).

Almost surely, 2^1123242305 is an apocalyptic number.

It is an amenable number.

1123242305 is a deficient number, since it is larger than the sum of its proper divisors (224648467).

1123242305 is an equidigital number, since it uses as much as digits as its factorization.

1123242305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224648466.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1123242305 is about 33514.8072499306. The cubic root of 1123242305 is about 1039.4999769024.

Adding to 1123242305 its reverse (5032423211), we get a palindrome (6155665516).

The spelling of 1123242305 in words is "one billion, one hundred twenty-three million, two hundred forty-two thousand, three hundred five".