1123520684 has 96 divisors (see below), whose sum is σ = 2503581696. Its totient is φ = 433198080.

The previous prime is 1123520683. The next prime is 1123520687. The reversal of 1123520684 is 4860253211.

It is a self number, because there is not a number n which added to its sum of digits gives 1123520684.

It is not an unprimeable number, because it can be changed into a prime (1123520681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 416789 + ... + 419475.

It is an arithmetic number, because the mean of its divisors is an integer number (26078976).

Almost surely, 2^1123520684 is an apocalyptic number.

It is an amenable number.

1123520684 is an abundant number, since it is smaller than the sum of its proper divisors (1380061012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1123520684 is a wasteful number, since it uses less digits than its factorization.

1123520684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2775 (or 2773 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1123520684 is about 33518.9600674007. The cubic root of 1123520684 is about 1039.5858447098.

Adding to 1123520684 its reverse (4860253211), we get a palindrome (5983773895).

The spelling of 1123520684 in words is "one billion, one hundred twenty-three million, five hundred twenty thousand, six hundred eighty-four".