1123778142 has 24 divisors (see below), whose sum is σ = 2563003560. Its totient is φ = 354877200.

The previous prime is 1123778113. The next prime is 1123778147. The reversal of 1123778142 is 2418773211.

It is a junction number, because it is equal to n+sod(n) for n = 1123778097 and 1123778106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123778147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1642609 + ... + 1643292.

It is an arithmetic number, because the mean of its divisors is an integer number (106791815).

Almost surely, 2^1123778142 is an apocalyptic number.

1123778142 is an abundant number, since it is smaller than the sum of its proper divisors (1439225418).

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

1123778142 is a wasteful number, since it uses less digits than its factorization.

1123778142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3285928 (or 3285925 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 1123778142 is about 33522.8003305213. The cubic root of 1123778142 is about 1039.6652466750.

The spelling of 1123778142 in words is "one billion, one hundred twenty-three million, seven hundred seventy-eight thousand, one hundred forty-two".