2585281 has 4 divisors (see below), whose sum is σ = 2588500. Its totient is φ = 2582064.

The previous prime is 2585279. The next prime is 2585293. The reversal of 2585281 is 1825852.

2585281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1123600 + 1461681 = 1060^2 + 1209^2 .

It is a cyclic number.

It is not a de Polignac number, because 2585281 - 2¹ = 2585279 is a prime.

It is a super-2 number, since 2×2585281² = 13367355697922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2585251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715 + ... + 2383.

It is an arithmetic number, because the mean of its divisors is an integer number (647125).

2^2585281 is an apocalyptic number.

It is an amenable number.

2585281 is a deficient number, since it is larger than the sum of its proper divisors (3219).

2585281 is a wasteful number, since it uses less digits than its factorization.

2585281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3218.

The product of its digits is 6400, while the sum is 31.

The square root of 2585281 is about 1607.8809035498. The cubic root of 2585281 is about 137.2469129578.

The spelling of 2585281 in words is "two million, five hundred eighty-five thousand, two hundred eighty-one".