2587581 has 12 divisors (see below), whose sum is σ = 3773952. Its totient is φ = 1708296.

The previous prime is 2587567. The next prime is 2587589. The reversal of 2587581 is 1857852.

It is not a de Polignac number, because 2587581 - 2⁵ = 2587549 is a prime.

It is a super-2 number, since 2×2587581² = 13391150863122, which contains 22 as substring.

Its product of digits (22400) is a multiple of the sum of its prime factors (2800).

2587581 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2587589) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 381 + ... + 2306.

It is an arithmetic number, because the mean of its divisors is an integer number (314496).

2^2587581 is an apocalyptic number.

It is an amenable number.

2587581 is a deficient number, since it is larger than the sum of its proper divisors (1186371).

2587581 is a wasteful number, since it uses less digits than its factorization.

2587581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800 (or 2797 counting only the distinct ones).

The product of its digits is 22400, while the sum is 36.

The square root of 2587581 is about 1608.5959716473. The cubic root of 2587581 is about 137.2876015502.

The spelling of 2587581 in words is "two million, five hundred eighty-seven thousand, five hundred eighty-one".