12609321 has 8 divisors (see below), whose sum is σ = 16986144. Its totient is φ = 8319360.

The previous prime is 12609319. The next prime is 12609323. The reversal of 12609321 is 12390621.

It is an interprime number because it is at equal distance from previous prime (12609319) and next prime (12609323).

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

It is not a de Polignac number, because 12609321 - 2¹ = 12609319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12609291 and 12609300.

It is not an unprimeable number, because it can be changed into a prime (12609323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21375 + ... + 21956.

It is an arithmetic number, because the mean of its divisors is an integer number (2123268).

Almost surely, 2^12609321 is an apocalyptic number.

It is an amenable number.

12609321 is a deficient number, since it is larger than the sum of its proper divisors (4376823).

12609321 is an equidigital number, since it uses as much as digits as its factorization.

12609321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43431.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 12609321 is about 3550.9605742672. The cubic root of 12609321 is about 232.7540430474.

Adding to 12609321 its reverse (12390621), we get a palindrome (24999942).

The spelling of 12609321 in words is "twelve million, six hundred nine thousand, three hundred twenty-one".