1298130887 has 2 divisors, whose sum is σ = 1298130888. Its totient is φ = 1298130886.

The previous prime is 1298130877. The next prime is 1298130937. The reversal of 1298130887 is 7880318921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1298130887 - 2¹⁰ = 1298129863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1298130877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649065443 + 649065444.

It is an arithmetic number, because the mean of its divisors is an integer number (649065444).

Almost surely, 2^1298130887 is an apocalyptic number.

1298130887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298130887 is an equidigital number, since it uses as much as digits as its factorization.

1298130887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 1298130887 is about 36029.5834974539. The cubic root of 1298130887 is about 1090.8695715055.

The spelling of 1298130887 in words is "one billion, two hundred ninety-eight million, one hundred thirty thousand, eight hundred eighty-seven".