1128243 has 4 divisors (see below), whose sum is σ = 1504328. Its totient is φ = 752160.

The previous prime is 1128233. The next prime is 1128247. The reversal of 1128243 is 3428211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3428211 = 3 ⋅1142737.

It is not a de Polignac number, because 1128243 - 2⁴ = 1128227 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1128247) 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, 188038 + ... + 188043.

It is an arithmetic number, because the mean of its divisors is an integer number (376082).

2^1128243 is an apocalyptic number.

1128243 is a deficient number, since it is larger than the sum of its proper divisors (376085).

1128243 is an equidigital number, since it uses as much as digits as its factorization.

1128243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376084.

The product of its digits is 384, while the sum is 21.

The square root of 1128243 is about 1062.1878364960. The cubic root of 1128243 is about 104.1040317499.

Subtracting 1128243 from its reverse (3428211), we obtain a cube (2299968 = 132³).

It can be divided in two parts, 11282 and 43, that added together give a triangular number (11325 = T₁₅₀).

The spelling of 1128243 in words is "one million, one hundred twenty-eight thousand, two hundred forty-three".