1123231265 has 32 divisors (see below), whose sum is σ = 1536796800. Its totient is φ = 781263360.

The previous prime is 1123231261. The next prime is 1123231267. The reversal of 1123231265 is 5621323211.

It is a happy number.

It is not a de Polignac number, because 1123231265 - 2² = 1123231261 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1123231261) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 218525 + ... + 223605.

It is an arithmetic number, because the mean of its divisors is an integer number (48024900).

Almost surely, 2^1123231265 is an apocalyptic number.

It is an amenable number.

1123231265 is a deficient number, since it is larger than the sum of its proper divisors (413565535).

1123231265 is a wasteful number, since it uses less digits than its factorization.

1123231265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5297.

The product of its digits is 2160, while the sum is 26.

The square root of 1123231265 is about 33514.6425462066. The cubic root of 1123231265 is about 1039.4965712504.

Adding to 1123231265 its reverse (5621323211), we get a palindrome (6744554476).

The spelling of 1123231265 in words is "one billion, one hundred twenty-three million, two hundred thirty-one thousand, two hundred sixty-five".