2571987 has 16 divisors (see below), whose sum is σ = 3807360. Its totient is φ = 1531200.

The previous prime is 2571979. The next prime is 2572001. The reversal of 2571987 is 7891752.

It is not a de Polignac number, because 2571987 - 2³ = 2571979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2571937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1287 + ... + 2607.

It is an arithmetic number, because the mean of its divisors is an integer number (237960).

2^2571987 is an apocalyptic number.

2571987 is a deficient number, since it is larger than the sum of its proper divisors (1235373).

2571987 is a wasteful number, since it uses less digits than its factorization.

2571987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394.

The product of its digits is 35280, while the sum is 39.

The square root of 2571987 is about 1603.7415627214. The cubic root of 2571987 is about 137.0112587760.

The spelling of 2571987 in words is "two million, five hundred seventy-one thousand, nine hundred eighty-seven".