12321617 has 16 divisors (see below), whose sum is σ = 16267392. Its totient is φ = 9035520.

The previous prime is 12321611. The next prime is 12321637. The reversal of 12321617 is 71612321.

It is a cyclic number.

It is not a de Polignac number, because 12321617 - 2¹⁶ = 12256081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12321592 and 12321601.

It is not an unprimeable number, because it can be changed into a prime (12321611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3398 + ... + 6015.

It is an arithmetic number, because the mean of its divisors is an integer number (1016712).

Almost surely, 2^12321617 is an apocalyptic number.

12321617 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12321617 is a deficient number, since it is larger than the sum of its proper divisors (3945775).

12321617 is a wasteful number, since it uses less digits than its factorization.

12321617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9448.

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

The square root of 12321617 is about 3510.2160902144. The cubic root of 12321617 is about 230.9701741193.

Adding to 12321617 its reverse (71612321), we get a palindrome (83933938).

The spelling of 12321617 in words is "twelve million, three hundred twenty-one thousand, six hundred seventeen".