1128520 has 32 divisors (see below), whose sum is σ = 2575800. Its totient is φ = 444928.

The previous prime is 1128509. The next prime is 1128521. The reversal of 1128520 is 258211.

It can be written as a sum of positive squares in 4 ways, for example, as 432964 + 695556 = 658^2 + 834^2 .

It is not an unprimeable number, because it can be changed into a prime (1128521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3402 + ... + 3718.

2^1128520 is an apocalyptic number.

1128520 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 1128520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1287900).

1128520 is an abundant number, since it is smaller than the sum of its proper divisors (1447280).

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

1128520 is a wasteful number, since it uses less digits than its factorization.

1128520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1128520 is about 1062.3182197440. The cubic root of 1128520 is about 104.1125507354.

The spelling of 1128520 in words is "one million, one hundred twenty-eight thousand, five hundred twenty".