1125531528 has 128 divisors (see below), whose sum is σ = 3206044800. Its totient is φ = 326144000.

The previous prime is 1125531509. The next prime is 1125531541. The reversal of 1125531528 is 8251355211.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 864478 + ... + 865778.

It is an arithmetic number, because the mean of its divisors is an integer number (25047225).

Almost surely, 2^1125531528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1125531528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1603022400).

1125531528 is an abundant number, since it is smaller than the sum of its proper divisors (2080513272).

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

1125531528 is a wasteful number, since it uses less digits than its factorization.

1125531528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463 (or 1459 counting only the distinct ones).

The product of its digits is 12000, while the sum is 33.

The square root of 1125531528 is about 33548.9422784087. The cubic root of 1125531528 is about 1040.2056817061.

Adding to 1125531528 its reverse (8251355211), we get a palindrome (9376886739).

The spelling of 1125531528 in words is "one billion, one hundred twenty-five million, five hundred thirty-one thousand, five hundred twenty-eight".