1317269521 has 2 divisors, whose sum is σ = 1317269522. Its totient is φ = 1317269520.

The previous prime is 1317269507. The next prime is 1317269543. The reversal of 1317269521 is 1259627131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1212432400 + 104837121 = 34820^2 + 10239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1317269521 is a prime.

It is not a weakly prime, because it can be changed into another prime (1317264521) 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, 658634760 + 658634761.

It is an arithmetic number, because the mean of its divisors is an integer number (658634761).

Almost surely, 2^1317269521 is an apocalyptic number.

It is an amenable number.

1317269521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317269521 is an equidigital number, since it uses as much as digits as its factorization.

1317269521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The square root of 1317269521 is about 36294.2078161240. The cubic root of 1317269521 is about 1096.2044171900.

The spelling of 1317269521 in words is "one billion, three hundred seventeen million, two hundred sixty-nine thousand, five hundred twenty-one".