1128311 has 4 divisors (see below), whose sum is σ = 1177392. Its totient is φ = 1079232.

The previous prime is 1128301. The next prime is 1128313. The reversal of 1128311 is 1138211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1138211 = 149 ⋅7639.

It is a cyclic number.

It is not a de Polignac number, because 1128311 - 2⁶ = 1128247 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1128311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24506 + ... + 24551.

It is an arithmetic number, because the mean of its divisors is an integer number (294348).

2^1128311 is an apocalyptic number.

1128311 is a deficient number, since it is larger than the sum of its proper divisors (49081).

1128311 is an equidigital number, since it uses as much as digits as its factorization.

1128311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49080.

The product of its digits is 48, while the sum is 17.

The square root of 1128311 is about 1062.2198454181. The cubic root of 1128311 is about 104.1061231823.

The spelling of 1128311 in words is "one million, one hundred twenty-eight thousand, three hundred eleven".