1298987143 has 2 divisors, whose sum is σ = 1298987144. Its totient is φ = 1298987142.

The previous prime is 1298987059. The next prime is 1298987171. The reversal of 1298987143 is 3417898921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1298987143 - 2⁹ = 1298986631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1298987743) 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, 649493571 + 649493572.

It is an arithmetic number, because the mean of its divisors is an integer number (649493572).

Almost surely, 2^1298987143 is an apocalyptic number.

1298987143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298987143 is an equidigital number, since it uses as much as digits as its factorization.

1298987143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 52.

The square root of 1298987143 is about 36041.4642183139. The cubic root of 1298987143 is about 1091.1093671298.

The spelling of 1298987143 in words is "one billion, two hundred ninety-eight million, nine hundred eighty-seven thousand, one hundred forty-three".