2581286 has 4 divisors (see below), whose sum is σ = 3871932. Its totient is φ = 1290642.

The previous prime is 2581279. The next prime is 2581289. The reversal of 2581286 is 6821852.

2581286 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.

It is an Ulam number.

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 as a sum of consecutive naturals, namely, 645320 + ... + 645323.

It is an arithmetic number, because the mean of its divisors is an integer number (967983).

2^2581286 is an apocalyptic number.

2581286 is a deficient number, since it is larger than the sum of its proper divisors (1290646).

2581286 is a wasteful number, since it uses less digits than its factorization.

2581286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290645.

The product of its digits is 7680, while the sum is 32.

The square root of 2581286 is about 1606.6381048637. The cubic root of 2581286 is about 137.1761812414.

The spelling of 2581286 in words is "two million, five hundred eighty-one thousand, two hundred eighty-six".