12123387 has 24 divisors (see below), whose sum is σ = 19036160. Its totient is φ = 7406640.

The previous prime is 12123373. The next prime is 12123439. The reversal of 12123387 is 78332121.

It is not a de Polignac number, because 12123387 - 2¹⁴ = 12107003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12123387.

It is not an unprimeable number, because it can be changed into a prime (12123317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4158 + ... + 6444.

Almost surely, 2^12123387 is an apocalyptic number.

12123387 is a deficient number, since it is larger than the sum of its proper divisors (6912773).

12123387 is a wasteful number, since it uses less digits than its factorization.

12123387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2343 (or 2340 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 12123387 is about 3481.8654482906. The cubic root of 12123387 is about 229.7248568699.

The spelling of 12123387 in words is "twelve million, one hundred twenty-three thousand, three hundred eighty-seven".