1128285 has 12 divisors (see below), whose sum is σ = 1955772. Its totient is φ = 601728.

The previous prime is 1128251. The next prime is 1128287. The reversal of 1128285 is 5828211.

It can be written as a sum of positive squares in 2 ways, for example, as 427716 + 700569 = 654^2 + 837^2 .

It is not a de Polignac number, because 1128285 - 2⁹ = 1127773 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12492 + ... + 12581.

It is an arithmetic number, because the mean of its divisors is an integer number (162981).

2^1128285 is an apocalyptic number.

1128285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1128285 is a deficient number, since it is larger than the sum of its proper divisors (827487).

1128285 is a wasteful number, since it uses less digits than its factorization.

1128285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25084 (or 25081 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 1128285 is about 1062.2076068265. The cubic root of 1128285 is about 104.1053235269.

The spelling of 1128285 in words is "one million, one hundred twenty-eight thousand, two hundred eighty-five".