12321577 has 2 divisors, whose sum is σ = 12321578. Its totient is φ = 12321576.

The previous prime is 12321571. The next prime is 12321593. The reversal of 12321577 is 77512321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11262736 + 1058841 = 3356^2 + 1029^2 .

It is a cyclic number.

It is not a de Polignac number, because 12321577 - 2¹¹ = 12319529 is a prime.

It is not a weakly prime, because it can be changed into another prime (12321571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160788 + 6160789.

It is an arithmetic number, because the mean of its divisors is an integer number (6160789).

Almost surely, 2^12321577 is an apocalyptic number.

It is an amenable number.

12321577 is a deficient number, since it is larger than the sum of its proper divisors (1).

12321577 is an equidigital number, since it uses as much as digits as its factorization.

12321577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2940, while the sum is 28.

The square root of 12321577 is about 3510.2103925548. The cubic root of 12321577 is about 230.9699241841.

Adding to 12321577 its reverse (77512321), we get a palindrome (89833898).

It can be divided in two parts, 1232 and 1577, that added together give a square (2809 = 53²).

The spelling of 12321577 in words is "twelve million, three hundred twenty-one thousand, five hundred seventy-seven".