2555985 has 16 divisors (see below), whose sum is σ = 4140864. Its totient is φ = 1346112.

The previous prime is 2555957. The next prime is 2555989. The reversal of 2555985 is 5895552.

It is not a de Polignac number, because 2555985 - 2¹¹ = 2553937 is a prime.

2555985 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2555989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219 + ... + 2271.

It is an arithmetic number, because the mean of its divisors is an integer number (258804).

2^2555985 is an apocalyptic number.

It is an amenable number.

2555985 is a deficient number, since it is larger than the sum of its proper divisors (1584879).

2555985 is a wasteful number, since it uses less digits than its factorization.

2555985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144.

The product of its digits is 90000, while the sum is 39.

The square root of 2555985 is about 1598.7448201636. The cubic root of 2555985 is about 136.7265221323.

The spelling of 2555985 in words is "two million, five hundred fifty-five thousand, nine hundred eighty-five".