1287142511 has 2 divisors, whose sum is σ = 1287142512. Its totient is φ = 1287142510.

The previous prime is 1287142501. The next prime is 1287142529. The reversal of 1287142511 is 1152417821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1287142511 - 2¹⁸ = 1286880367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1287142501) 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, 643571255 + 643571256.

It is an arithmetic number, because the mean of its divisors is an integer number (643571256).

Almost surely, 2^1287142511 is an apocalyptic number.

1287142511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287142511 is an equidigital number, since it uses as much as digits as its factorization.

1287142511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4480, while the sum is 32.

The square root of 1287142511 is about 35876.7684024077. The cubic root of 1287142511 is about 1087.7828598957.

The spelling of 1287142511 in words is "one billion, two hundred eighty-seven million, one hundred forty-two thousand, five hundred eleven".