1128331 has 4 divisors (see below), whose sum is σ = 1131232. Its totient is φ = 1125432.

The previous prime is 1128313. The next prime is 1128349. The reversal of 1128331 is 1338211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1338211 = 7 ⋅191173.

It is an interprime number because it is at equal distance from previous prime (1128313) and next prime (1128349).

It is a cyclic number.

It is not a de Polignac number, because 1128331 - 2⁵ = 1128299 is a prime.

It is a super-2 number, since 2×1128331² = 2546261691122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1128299 and 1128308.

It is not an unprimeable number, because it can be changed into a prime (1128301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756 + ... + 1681.

It is an arithmetic number, because the mean of its divisors is an integer number (282808).

2^1128331 is an apocalyptic number.

1128331 is a deficient number, since it is larger than the sum of its proper divisors (2901).

1128331 is an equidigital number, since it uses as much as digits as its factorization.

1128331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900.

The product of its digits is 144, while the sum is 19.

The square root of 1128331 is about 1062.2292596234. The cubic root of 1128331 is about 104.1067382935.

The spelling of 1128331 in words is "one million, one hundred twenty-eight thousand, three hundred thirty-one".