1128923 has 4 divisors (see below), whose sum is σ = 1188360. Its totient is φ = 1069488.

The previous prime is 1128917. The next prime is 1128931. The reversal of 1128923 is 3298211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3298211 = 7 ⋅471173.

It is a cyclic number.

It is not a de Polignac number, because 1128923 - 2⁸ = 1128667 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1128892 and 1128901.

It is not an unprimeable number, because it can be changed into a prime (1128943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29690 + ... + 29727.

It is an arithmetic number, because the mean of its divisors is an integer number (297090).

2^1128923 is an apocalyptic number.

1128923 is a deficient number, since it is larger than the sum of its proper divisors (59437).

1128923 is an equidigital number, since it uses as much as digits as its factorization.

1128923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59436.

The product of its digits is 864, while the sum is 26.

The square root of 1128923 is about 1062.5078823237. The cubic root of 1128923 is about 104.1249422938.

The spelling of 1128923 in words is "one million, one hundred twenty-eight thousand, nine hundred twenty-three".