12123617 has 4 divisors (see below), whose sum is σ = 13225776. Its totient is φ = 11021460.

The previous prime is 12123607. The next prime is 12123637. The reversal of 12123617 is 71632121.

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 12123617 - 2⁸ = 12123361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12123592 and 12123601.

It is not an unprimeable number, because it can be changed into a prime (12123607) 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, 551063 + ... + 551084.

It is an arithmetic number, because the mean of its divisors is an integer number (3306444).

Almost surely, 2^12123617 is an apocalyptic number.

It is an amenable number.

12123617 is a deficient number, since it is larger than the sum of its proper divisors (1102159).

12123617 is a wasteful number, since it uses less digits than its factorization.

12123617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102158.

The product of its digits is 504, while the sum is 23.

The square root of 12123617 is about 3481.8984764062. The cubic root of 12123617 is about 229.7263096097.

Adding to 12123617 its reverse (71632121), we get a palindrome (83755738).

The spelling of 12123617 in words is "twelve million, one hundred twenty-three thousand, six hundred seventeen".