2006123 has 4 divisors (see below), whose sum is σ = 2292720. Its totient is φ = 1719528.

The previous prime is 2006111. The next prime is 2006141. The reversal of 2006123 is 3216002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2006123 - 2²⁰ = 957547 is a prime.

It is a super-2 number, since 2×2006123² = 8049058982258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2006098 and 2006107.

It is not an unprimeable number, because it can be changed into a prime (2006183) 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, 143288 + ... + 143301.

It is an arithmetic number, because the mean of its divisors is an integer number (573180).

2^2006123 is an apocalyptic number.

2006123 is a deficient number, since it is larger than the sum of its proper divisors (286597).

2006123 is an equidigital number, since it uses as much as digits as its factorization.

2006123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286596.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2006123 is about 1416.3767154257. The cubic root of 2006123 is about 126.1205489446.

The spelling of 2006123 in words is "two million, six thousand, one hundred twenty-three".