12650321 has 2 divisors, whose sum is σ = 12650322. Its totient is φ = 12650320.

The previous prime is 12650317. The next prime is 12650353. The reversal of 12650321 is 12305621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6574096 + 6076225 = 2564^2 + 2465^2 .

It is a cyclic number.

It is not a de Polignac number, because 12650321 - 2² = 12650317 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12650293 and 12650302.

It is not a weakly prime, because it can be changed into another prime (12650021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6325160 + 6325161.

It is an arithmetic number, because the mean of its divisors is an integer number (6325161).

Almost surely, 2^12650321 is an apocalyptic number.

It is an amenable number.

12650321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12650321 is an equidigital number, since it uses as much as digits as its factorization.

12650321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 12650321 is about 3556.7289747744. The cubic root of 12650321 is about 233.0060415829.

Adding to 12650321 its reverse (12305621), we get a palindrome (24955942).

The spelling of 12650321 in words is "twelve million, six hundred fifty thousand, three hundred twenty-one".