1306240729 has 2 divisors, whose sum is σ = 1306240730. Its totient is φ = 1306240728.

The previous prime is 1306240717. The next prime is 1306240811. The reversal of 1306240729 is 9270426031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1137240729 + 169000000 = 33723^2 + 13000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1306240729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1306240694 and 1306240703.

It is not a weakly prime, because it can be changed into another prime (1306240829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653120364 + 653120365.

It is an arithmetic number, because the mean of its divisors is an integer number (653120365).

Almost surely, 2^1306240729 is an apocalyptic number.

It is an amenable number.

1306240729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306240729 is an equidigital number, since it uses as much as digits as its factorization.

1306240729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 1306240729 is about 36141.9524790789. The cubic root of 1306240729 is about 1093.1365284913.

The spelling of 1306240729 in words is "one billion, three hundred six million, two hundred forty thousand, seven hundred twenty-nine".