1123742120 has 64 divisors (see below), whose sum is σ = 2556262800. Its totient is φ = 444579840.

The previous prime is 1123742111. The next prime is 1123742153. The reversal of 1123742120 is 212473211.

It can be written as a sum of positive squares in 8 ways, for example, as 223622116 + 900120004 = 14954^2 + 30002^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1947272 + ... + 1947848.

Almost surely, 2^1123742120 is an apocalyptic number.

1123742120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123742120 is an abundant number, since it is smaller than the sum of its proper divisors (1432520680).

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

1123742120 is a wasteful number, since it uses less digits than its factorization.

1123742120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038 (or 1034 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1123742120 is about 33522.2630500985. The cubic root of 1123742120 is about 1039.6541379516.

The spelling of 1123742120 in words is "one billion, one hundred twenty-three million, seven hundred forty-two thousand, one hundred twenty".