12123869 has 4 divisors (see below), whose sum is σ = 12138144. Its totient is φ = 12109596.

The previous prime is 12123857. The next prime is 12123877. The reversal of 12123869 is 96832121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12123869 - 2¹² = 12119773 is a prime.

It is a super-2 number, since 2×12123869² = 293976399058322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123899) 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 3 ways as a sum of consecutive naturals, for example, 5777 + ... + 7590.

It is an arithmetic number, because the mean of its divisors is an integer number (3034536).

Almost surely, 2^12123869 is an apocalyptic number.

It is an amenable number.

12123869 is a deficient number, since it is larger than the sum of its proper divisors (14275).

12123869 is an equidigital number, since it uses as much as digits as its factorization.

12123869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14274.

The product of its digits is 5184, while the sum is 32.

The square root of 12123869 is about 3481.9346633732. The cubic root of 12123869 is about 229.7279012862.

The spelling of 12123869 in words is "twelve million, one hundred twenty-three thousand, eight hundred sixty-nine".