2559985 has 4 divisors (see below), whose sum is σ = 3071988. Its totient is φ = 2047984.

The previous prime is 2559983. The next prime is 2559989. The reversal of 2559985 is 5899552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1098304 + 1461681 = 1048^2 + 1209^2 .

It is a cyclic number.

It is not a de Polignac number, because 2559985 - 2¹ = 2559983 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 5⁵ + 5⁷ + 9² + 9³ + 8³ + 5⁹ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2559983) 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 in 3 ways as a sum of consecutive naturals, for example, 255994 + ... + 256003.

It is an arithmetic number, because the mean of its divisors is an integer number (767997).

2^2559985 is an apocalyptic number.

It is an amenable number.

2559985 is a deficient number, since it is larger than the sum of its proper divisors (512003).

2559985 is an equidigital number, since it uses as much as digits as its factorization.

2559985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512002.

The product of its digits is 162000, while the sum is 43.

The square root of 2559985 is about 1599.9953124931. The cubic root of 2559985 is about 136.7978085499.

The spelling of 2559985 in words is "two million, five hundred fifty-nine thousand, nine hundred eighty-five".