13130321 has 2 divisors, whose sum is σ = 13130322. Its totient is φ = 13130320.

The previous prime is 13130317. The next prime is 13130339. The reversal of 13130321 is 12303131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13104400 + 25921 = 3620^2 + 161^2 .

It is an emirp because it is prime and its reverse (12303131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13130321 - 2² = 13130317 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13130296 and 13130305.

It is not a weakly prime, because it can be changed into another prime (13130371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6565160 + 6565161.

It is an arithmetic number, because the mean of its divisors is an integer number (6565161).

Almost surely, 2^13130321 is an apocalyptic number.

It is an amenable number.

13130321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13130321 is an equidigital number, since it uses as much as digits as its factorization.

13130321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 13130321 is about 3623.5784799008. The cubic root of 13130321 is about 235.9165713436.

Adding to 13130321 its reverse (12303131), we get a palindrome (25433452).

The spelling of 13130321 in words is "thirteen million, one hundred thirty thousand, three hundred twenty-one".