12009123 has 24 divisors (see below), whose sum is σ = 20992608. Its totient is φ = 6458112.

The previous prime is 12009119. The next prime is 12009133. The reversal of 12009123 is 32190021.

It is a happy number.

It is not a de Polignac number, because 12009123 - 2² = 12009119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12009096 and 12009105.

It is not an unprimeable number, because it can be changed into a prime (12009133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4536 + ... + 6677.

It is an arithmetic number, because the mean of its divisors is an integer number (874692).

Almost surely, 2^12009123 is an apocalyptic number.

12009123 is a deficient number, since it is larger than the sum of its proper divisors (8983485).

12009123 is a wasteful number, since it uses less digits than its factorization.

12009123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11243 (or 11240 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 12009123 is about 3465.4181565866. The cubic root of 12009123 is about 229.0008517477. Note that the first 3 decimals are identical.

Adding to 12009123 its reverse (32190021), we get a palindrome (44199144).

The spelling of 12009123 in words is "twelve million, nine thousand, one hundred twenty-three".