1188123 has 4 divisors (see below), whose sum is σ = 1584168. Its totient is φ = 792080.

The previous prime is 1188073. The next prime is 1188149. The reversal of 1188123 is 3218811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3218811 = 3 ⋅1072937.

It is a cyclic number.

It is not a de Polignac number, because 1188123 - 2⁶ = 1188059 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 1188093 and 1188102.

It is not an unprimeable number, because it can be changed into a prime (1188223) 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, 198018 + ... + 198023.

It is an arithmetic number, because the mean of its divisors is an integer number (396042).

2^1188123 is an apocalyptic number.

1188123 is a deficient number, since it is larger than the sum of its proper divisors (396045).

1188123 is an equidigital number, since it uses as much as digits as its factorization.

1188123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396044.

The product of its digits is 384, while the sum is 24.

The square root of 1188123 is about 1090.0105504077. The cubic root of 1188123 is about 105.9141050923.

The spelling of 1188123 in words is "one million, one hundred eighty-eight thousand, one hundred twenty-three".