13130521 has 2 divisors, whose sum is σ = 13130522. Its totient is φ = 13130520.

The previous prime is 13130519. The next prime is 13130549. The reversal of 13130521 is 12503131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10634121 + 2496400 = 3261^2 + 1580^2 .

It is an emirp because it is prime and its reverse (12503131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13130521 - 2¹ = 13130519 is a prime.

Together with 13130519, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 13130495 and 13130504.

It is not a weakly prime, because it can be changed into another prime (13130561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6565260 + 6565261.

It is an arithmetic number, because the mean of its divisors is an integer number (6565261).

Almost surely, 2^13130521 is an apocalyptic number.

It is an amenable number.

13130521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13130521 is an equidigital number, since it uses as much as digits as its factorization.

13130521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 13130521 is about 3623.6060768246. The cubic root of 13130521 is about 235.9177691583.

Adding to 13130521 its reverse (12503131), we get a palindrome (25633652).

The spelling of 13130521 in words is "thirteen million, one hundred thirty thousand, five hundred twenty-one".