1123187142 has 64 divisors (see below), whose sum is σ = 2811322368. Its totient is φ = 290628000.

The previous prime is 1123187123. The next prime is 1123187167. The reversal of 1123187142 is 2417813211.

1123187142 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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, 120717 + ... + 129687.

It is an arithmetic number, because the mean of its divisors is an integer number (43926912).

Almost surely, 2^1123187142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123187142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1405661184).

1123187142 is an abundant number, since it is smaller than the sum of its proper divisors (1688135226).

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

1123187142 is a wasteful number, since it uses less digits than its factorization.

1123187142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9265.

The product of its digits is 2688, while the sum is 30.

The square root of 1123187142 is about 33513.9842752246. The cubic root of 1123187142 is about 1039.4829598333.

The spelling of 1123187142 in words is "one billion, one hundred twenty-three million, one hundred eighty-seven thousand, one hundred forty-two".