1328123 has 4 divisors (see below), whose sum is σ = 1333920. Its totient is φ = 1322328.

The previous prime is 1328111. The next prime is 1328143. The reversal of 1328123 is 3218231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3218231 = 47 ⋅68473.

It is a cyclic number.

It is not a de Polignac number, because 1328123 - 2¹⁰ = 1327099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1328095 and 1328104.

It is not an unprimeable number, because it can be changed into a prime (1328143) 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, 2540 + ... + 3017.

It is an arithmetic number, because the mean of its divisors is an integer number (333480).

2^1328123 is an apocalyptic number.

1328123 is a deficient number, since it is larger than the sum of its proper divisors (5797).

1328123 is an equidigital number, since it uses as much as digits as its factorization.

1328123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5796.

The product of its digits is 288, while the sum is 20.

The square root of 1328123 is about 1152.4421894395. The cubic root of 1328123 is about 109.9206866280.

The spelling of 1328123 in words is "one million, three hundred twenty-eight thousand, one hundred twenty-three".