1123245112 has 128 divisors (see below), whose sum is σ = 2517557760. Its totient is φ = 464555520.

The previous prime is 1123245091. The next prime is 1123245121. The reversal of 1123245112 is 2115423211.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3968923 + ... + 3969205.

It is an arithmetic number, because the mean of its divisors is an integer number (19668420).

Almost surely, 2^1123245112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123245112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1258778880).

1123245112 is an abundant number, since it is smaller than the sum of its proper divisors (1394312648).

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

1123245112 is a wasteful number, since it uses less digits than its factorization.

1123245112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413 (or 409 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 1123245112 is about 33514.8491269169. The cubic root of 1123245112 is about 1039.5008428106.

Adding to 1123245112 its reverse (2115423211), we get a palindrome (3238668323).

The spelling of 1123245112 in words is "one billion, one hundred twenty-three million, two hundred forty-five thousand, one hundred twelve".