1585481459 has 2 divisors, whose sum is σ = 1585481460. Its totient is φ = 1585481458.

The previous prime is 1585481449. The next prime is 1585481479. The reversal of 1585481459 is 9541845851.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1585481459 is a prime.

It is not a weakly prime, because it can be changed into another prime (1585481449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 792740729 + 792740730.

It is an arithmetic number, because the mean of its divisors is an integer number (792740730).

Almost surely, 2^1585481459 is an apocalyptic number.

1585481459 is a deficient number, since it is larger than the sum of its proper divisors (1).

1585481459 is an equidigital number, since it uses as much as digits as its factorization.

1585481459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152000, while the sum is 50.

The square root of 1585481459 is about 39818.1046635824. The cubic root of 1585481459 is about 1166.0586345772.

The spelling of 1585481459 in words is "one billion, five hundred eighty-five million, four hundred eighty-one thousand, four hundred fifty-nine".