1123512040 has 64 divisors (see below), whose sum is σ = 2897337600. Its totient is φ = 384096768.

The previous prime is 1123512037. The next prime is 1123512077. The reversal of 1123512040 is 402153211.

It is a junction number, because it is equal to n+sod(n) for n = 1123511999 and 1123512017.

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, 94932 + ... + 106108.

It is an arithmetic number, because the mean of its divisors is an integer number (45270900).

Almost surely, 2^1123512040 is an apocalyptic number.

1123512040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123512040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1448668800).

1123512040 is an abundant number, since it is smaller than the sum of its proper divisors (1773825560).

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

1123512040 is a wasteful number, since it uses less digits than its factorization.

1123512040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11554 (or 11550 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1123512040 is about 33518.8311252048. The cubic root of 1123512040 is about 1039.5831786253.

Adding to 1123512040 its reverse (402153211), we get a palindrome (1525665251).

The spelling of 1123512040 in words is "one billion, one hundred twenty-three million, five hundred twelve thousand, forty".