13217123 has 8 divisors (see below), whose sum is σ = 13512240. Its totient is φ = 12925440.

The previous prime is 13217117. The next prime is 13217131. The reversal of 13217123 is 32171231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13217123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13217095 and 13217104.

It is not an unprimeable number, because it can be changed into a prime (13217173) 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 7 ways as a sum of consecutive naturals, for example, 7868 + ... + 9398.

It is an arithmetic number, because the mean of its divisors is an integer number (1689030).

Almost surely, 2^13217123 is an apocalyptic number.

13217123 is a deficient number, since it is larger than the sum of its proper divisors (295117).

13217123 is an equidigital number, since it uses as much as digits as its factorization.

13217123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717.

The product of its digits is 252, while the sum is 20.

The square root of 13217123 is about 3635.5361365279. The cubic root of 13217123 is about 236.4352961538.

Adding to 13217123 its reverse (32171231), we get a palindrome (45388354).

The spelling of 13217123 in words is "thirteen million, two hundred seventeen thousand, one hundred twenty-three".