1123305305 has 16 divisors (see below), whose sum is σ = 1392588288. Its totient is φ = 868944000.

The previous prime is 1123305283. The next prime is 1123305319. The reversal of 1123305305 is 5035033211.

It is not a de Polignac number, because 1123305305 - 2⁶ = 1123305241 is a prime.

It is a super-2 number, since 2×1123305305² = 2523629616482286050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264650 + ... + 268860.

It is an arithmetic number, because the mean of its divisors is an integer number (87036768).

Almost surely, 2^1123305305 is an apocalyptic number.

It is an amenable number.

1123305305 is a deficient number, since it is larger than the sum of its proper divisors (269282983).

1123305305 is a wasteful number, since it uses less digits than its factorization.

1123305305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5968.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 1123305305 is about 33515.7471198241. The cubic root of 1123305305 is about 1039.5194109028.

Adding to 1123305305 its reverse (5035033211), we get a palindrome (6158338516).

The spelling of 1123305305 in words is "one billion, one hundred twenty-three million, three hundred five thousand, three hundred five".