2586861 has 12 divisors (see below), whose sum is σ = 3782688. Its totient is φ = 1703304.

The previous prime is 2586853. The next prime is 2586911. The reversal of 2586861 is 1686852.

It is a happy number.

It is not a de Polignac number, because 2586861 - 2³ = 2586853 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2586811) 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, 985 + ... + 2478.

It is an arithmetic number, because the mean of its divisors is an integer number (315224).

2^2586861 is an apocalyptic number.

It is an amenable number.

2586861 is a deficient number, since it is larger than the sum of its proper divisors (1195827).

2586861 is a wasteful number, since it uses less digits than its factorization.

2586861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3552 (or 3549 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 2586861 is about 1608.3721584260. The cubic root of 2586861 is about 137.2748668452.

Subtracting from 2586861 its reverse (1686852), we obtain a palindrome (900009).

The spelling of 2586861 in words is "two million, five hundred eighty-six thousand, eight hundred sixty-one".