1285861559 has 2 divisors, whose sum is σ = 1285861560. Its totient is φ = 1285861558.

The previous prime is 1285861553. The next prime is 1285861573. The reversal of 1285861559 is 9551685821.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9551685821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1285861559 - 2⁸ = 1285861303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285861553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642930779 + 642930780.

It is an arithmetic number, because the mean of its divisors is an integer number (642930780).

Almost surely, 2^1285861559 is an apocalyptic number.

1285861559 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285861559 is an equidigital number, since it uses as much as digits as its factorization.

1285861559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864000, while the sum is 50.

The square root of 1285861559 is about 35858.9118490787. The cubic root of 1285861559 is about 1087.4218897349.

The spelling of 1285861559 in words is "one billion, two hundred eighty-five million, eight hundred sixty-one thousand, five hundred fifty-nine".