1125504520 has 96 divisors (see below), whose sum is σ = 3100982400. Its totient is φ = 365565312.

The previous prime is 1125504511. The next prime is 1125504557. The reversal of 1125504520 is 254055211.

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, 22129 + ... + 52351.

It is an arithmetic number, because the mean of its divisors is an integer number (32301900).

Almost surely, 2^1125504520 is an apocalyptic number.

1125504520 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 1125504520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1550491200).

1125504520 is an abundant number, since it is smaller than the sum of its proper divisors (1975477880).

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

1125504520 is a wasteful number, since it uses less digits than its factorization.

1125504520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30267 (or 30256 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1125504520 is about 33548.5397595782. The cubic root of 1125504520 is about 1040.1973614594.

Adding to 1125504520 its reverse (254055211), we get a palindrome (1379559731).

The spelling of 1125504520 in words is "one billion, one hundred twenty-five million, five hundred four thousand, five hundred twenty".