13135321 has 2 divisors, whose sum is σ = 13135322. Its totient is φ = 13135320.

The previous prime is 13135307. The next prime is 13135379. The reversal of 13135321 is 12353131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12503296 + 632025 = 3536^2 + 795^2 .

It is a cyclic number.

It is not a de Polignac number, because 13135321 - 2⁷ = 13135193 is a prime.

It is not a weakly prime, because it can be changed into another prime (13135301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6567660 + 6567661.

It is an arithmetic number, because the mean of its divisors is an integer number (6567661).

Almost surely, 2^13135321 is an apocalyptic number.

It is an amenable number.

13135321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13135321 is an equidigital number, since it uses as much as digits as its factorization.

13135321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 19.

The square root of 13135321 is about 3624.2683399550. The cubic root of 13135321 is about 235.9465130630.

Adding to 13135321 its reverse (12353131), we get a palindrome (25488452).

It can be divided in two parts, 13135 and 321, that added together give a square (13456 = 116²).

The spelling of 13135321 in words is "thirteen million, one hundred thirty-five thousand, three hundred twenty-one".