1123203042 has 48 divisors (see below), whose sum is σ = 2630916288. Its totient is φ = 344268000.

The previous prime is 1123203023. The next prime is 1123203097. The reversal of 1123203042 is 2403023211.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52417 + ... + 70667.

It is an arithmetic number, because the mean of its divisors is an integer number (54810756).

Almost surely, 2^1123203042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123203042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1315458144).

1123203042 is an abundant number, since it is smaller than the sum of its proper divisors (1507713246).

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

1123203042 is a wasteful number, since it uses less digits than its factorization.

1123203042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18535 (or 18532 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1123203042 is about 33514.2214887949. The cubic root of 1123203042 is about 1039.4878648339.

Adding to 1123203042 its reverse (2403023211), we get a palindrome (3526226253).

The spelling of 1123203042 in words is "one billion, one hundred twenty-three million, two hundred three thousand, forty-two".