1285998487 has 2 divisors, whose sum is σ = 1285998488. Its totient is φ = 1285998486.

The previous prime is 1285998481. The next prime is 1285998499. The reversal of 1285998487 is 7848995821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1285998487 - 2²⁷ = 1151780759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285998481) 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, 642999243 + 642999244.

It is an arithmetic number, because the mean of its divisors is an integer number (642999244).

Almost surely, 2^1285998487 is an apocalyptic number.

1285998487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285998487 is an equidigital number, since it uses as much as digits as its factorization.

1285998487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11612160, while the sum is 61.

The square root of 1285998487 is about 35860.8210586428. The cubic root of 1285998487 is about 1087.4604872595.

The spelling of 1285998487 in words is "one billion, two hundred eighty-five million, nine hundred ninety-eight thousand, four hundred eighty-seven".