2560581 has 6 divisors (see below), whose sum is σ = 3698630. Its totient is φ = 1707048.

The previous prime is 2560549. The next prime is 2560583. The reversal of 2560581 is 1850652.

2560581 is a `hidden beast` number, since 25 + 60 + 581 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2117025 + 443556 = 1455^2 + 666^2 .

It is not a de Polignac number, because 2560581 - 2⁵ = 2560549 is a prime.

It is a super-2 number, since 2×2560581² = 13113150115122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2560583) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142246 + ... + 142263.

2^2560581 is an apocalyptic number.

It is an amenable number.

2560581 is a deficient number, since it is larger than the sum of its proper divisors (1138049).

2560581 is a wasteful number, since it uses less digits than its factorization.

2560581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284515 (or 284512 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 2560581 is about 1600.1815521996. The cubic root of 2560581 is about 136.8084238683.

It can be divided in two parts, 25 and 60581, that added together give a palindrome (60606).

The spelling of 2560581 in words is "two million, five hundred sixty thousand, five hundred eighty-one".