1285859 has 2 divisors, whose sum is σ = 1285860. Its totient is φ = 1285858.

The previous prime is 1285853. The next prime is 1285871. The reversal of 1285859 is 9585821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1285859 - 2²⁰ = 237283 is a prime.

It is not a weakly prime, because it can be changed into another prime (1285853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642929 + 642930.

It is an arithmetic number, because the mean of its divisors is an integer number (642930).

2^1285859 is an apocalyptic number.

1285859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285859 is an equidigital number, since it uses as much as digits as its factorization.

1285859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 38.

The square root of 1285859 is about 1133.9572302340. The cubic root of 1285859 is about 108.7421168373.

Subtracting from 1285859 its sum of digits (38), we obtain a palindrome (1285821).

The spelling of 1285859 in words is "one million, two hundred eighty-five thousand, eight hundred fifty-nine".