12572321 has 2 divisors, whose sum is σ = 12572322. Its totient is φ = 12572320.

The previous prime is 12572317. The next prime is 12572327. The reversal of 12572321 is 12327521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12285025 + 287296 = 3505^2 + 536^2 .

It is an emirp because it is prime and its reverse (12327521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12572321 - 2² = 12572317 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12572327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6286160 + 6286161.

It is an arithmetic number, because the mean of its divisors is an integer number (6286161).

Almost surely, 2^12572321 is an apocalyptic number.

It is an amenable number.

12572321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12572321 is an equidigital number, since it uses as much as digits as its factorization.

12572321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 23.

The square root of 12572321 is about 3545.7468888797. The cubic root of 12572321 is about 232.5261603893.

Adding to 12572321 its reverse (12327521), we get a palindrome (24899842).

The spelling of 12572321 in words is "twelve million, five hundred seventy-two thousand, three hundred twenty-one".