2581285 has 8 divisors (see below), whose sum is σ = 3540096. Its totient is φ = 1770000.

The previous prime is 2581279. The next prime is 2581289. The reversal of 2581285 is 5821852.

2581285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2581285 - 2⁵ = 2581253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581289) 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 7 ways as a sum of consecutive naturals, for example, 36841 + ... + 36910.

It is an arithmetic number, because the mean of its divisors is an integer number (442512).

2^2581285 is an apocalyptic number.

It is an amenable number.

2581285 is a deficient number, since it is larger than the sum of its proper divisors (958811).

2581285 is an equidigital number, since it uses as much as digits as its factorization.

2581285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73763.

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

The square root of 2581285 is about 1606.6377936548. The cubic root of 2581285 is about 137.1761635272.

The spelling of 2581285 in words is "two million, five hundred eighty-one thousand, two hundred eighty-five".