1123557120 has 216 divisors, whose sum is σ = 4443050976. Its totient is φ = 256794624.

The previous prime is 1123557101. The next prime is 1123557161. The reversal of 1123557120 is 217553211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73674 + ... + 87606.

Almost surely, 2^1123557120 is an apocalyptic number.

1123557120 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 1123557120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2221525488).

1123557120 is an abundant number, since it is smaller than the sum of its proper divisors (3319493856).

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

1123557120 is a wasteful number, since it uses less digits than its factorization.

1123557120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13967 (or 13950 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 1123557120 is about 33519.5035762763. The cubic root of 1123557120 is about 1039.5970825804.

The spelling of 1123557120 in words is "one billion, one hundred twenty-three million, five hundred fifty-seven thousand, one hundred twenty".