1125530120 has 64 divisors (see below), whose sum is σ = 2975192640. Its totient is φ = 377798400.

The previous prime is 1125530099. The next prime is 1125530129. The reversal of 1125530120 is 210355211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1125530092 and 1125530101.

It is not an unprimeable number, because it can be changed into a prime (1125530129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92666 + ... + 104105.

It is an arithmetic number, because the mean of its divisors is an integer number (46487385).

Almost surely, 2^1125530120 is an apocalyptic number.

1125530120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1125530120 is an abundant number, since it is smaller than the sum of its proper divisors (1849662520).

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

1125530120 is a wasteful number, since it uses less digits than its factorization.

1125530120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196806 (or 196802 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1125530120 is about 33548.9212941340. The cubic root of 1125530120 is about 1040.2052479524.

Adding to 1125530120 its reverse (210355211), we get a palindrome (1335885331).

The spelling of 1125530120 in words is "one billion, one hundred twenty-five million, five hundred thirty thousand, one hundred twenty".