1128321 has 12 divisors (see below), whose sum is σ = 1639248. Its totient is φ = 747864.

The previous prime is 1128313. The next prime is 1128349. The reversal of 1128321 is 1238211.

It is not a de Polignac number, because 1128321 - 2³ = 1128313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1128294 and 1128303.

It is not an unprimeable number, because it can be changed into a prime (1128301) 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, 2326 + ... + 2768.

It is an arithmetic number, because the mean of its divisors is an integer number (136604).

2^1128321 is an apocalyptic number.

It is an amenable number.

1128321 is a deficient number, since it is larger than the sum of its proper divisors (510927).

1128321 is a wasteful number, since it uses less digits than its factorization.

1128321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732 (or 729 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 1128321 is about 1062.2245525311. The cubic root of 1128321 is about 104.1064307388.

The spelling of 1128321 in words is "one million, one hundred twenty-eight thousand, three hundred twenty-one".