1260788591 has 2 divisors, whose sum is σ = 1260788592. Its totient is φ = 1260788590.

The previous prime is 1260788479. The next prime is 1260788603. The reversal of 1260788591 is 1958870621.

It is a strong prime.

It is an emirp because it is prime and its reverse (1958870621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1260788591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1260688591) 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, 630394295 + 630394296.

It is an arithmetic number, because the mean of its divisors is an integer number (630394296).

Almost surely, 2^1260788591 is an apocalyptic number.

1260788591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260788591 is an equidigital number, since it uses as much as digits as its factorization.

1260788591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 47.

The square root of 1260788591 is about 35507.5849784240. The cubic root of 1260788591 is about 1080.3075801466.

The spelling of 1260788591 in words is "one billion, two hundred sixty million, seven hundred eighty-eight thousand, five hundred ninety-one".