1165128 has 32 divisors (see below), whose sum is σ = 2983200. Its totient is φ = 379008.

The previous prime is 1165127. The next prime is 1165139. The reversal of 1165128 is 8215611.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 1165098 and 1165107.

It is not an unprimeable number, because it can be changed into a prime (1165121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468 + ... + 1596.

It is an arithmetic number, because the mean of its divisors is an integer number (93225).

2^1165128 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 1165128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1491600).

1165128 is an abundant number, since it is smaller than the sum of its proper divisors (1818072).

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

1165128 is a wasteful number, since it uses less digits than its factorization.

1165128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181 (or 1177 counting only the distinct ones).

The product of its digits is 480, while the sum is 24.

The square root of 1165128 is about 1079.4109504725. The cubic root of 1165128 is about 105.2263597340.

The spelling of 1165128 in words is "one million, one hundred sixty-five thousand, one hundred twenty-eight".