1123745140 has 24 divisors (see below), whose sum is σ = 2696988672. Its totient is φ = 385284000.

The previous prime is 1123745107. The next prime is 1123745143. The reversal of 1123745140 is 415473211.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 1123745099 and 1123745108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123745143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4013236 + ... + 4013515.

It is an arithmetic number, because the mean of its divisors is an integer number (112374528).

Almost surely, 2^1123745140 is an apocalyptic number.

1123745140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123745140 is an abundant number, since it is smaller than the sum of its proper divisors (1573243532).

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

1123745140 is a wasteful number, since it uses less digits than its factorization.

1123745140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8026767 (or 8026765 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1123745140 is about 33522.3080947598. The cubic root of 1123745140 is about 1039.6550692900.

The spelling of 1123745140 in words is "one billion, one hundred twenty-three million, seven hundred forty-five thousand, one hundred forty".