1260320813 has 2 divisors, whose sum is σ = 1260320814. Its totient is φ = 1260320812.

The previous prime is 1260320801. The next prime is 1260320819. The reversal of 1260320813 is 3180230621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 876278404 + 384042409 = 29602^2 + 19597^2 .

It is a cyclic number.

It is not a de Polignac number, because 1260320813 - 2¹⁴ = 1260304429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1260320819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630160406 + 630160407.

It is an arithmetic number, because the mean of its divisors is an integer number (630160407).

Almost surely, 2^1260320813 is an apocalyptic number.

It is an amenable number.

1260320813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260320813 is an equidigital number, since it uses as much as digits as its factorization.

1260320813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1260320813 is about 35500.9973521872. The cubic root of 1260320813 is about 1080.1739583183.

The spelling of 1260320813 in words is "one billion, two hundred sixty million, three hundred twenty thousand, eight hundred thirteen".