2587021 has 8 divisors (see below), whose sum is σ = 2782080. Its totient is φ = 2397888.

The previous prime is 2587019. The next prime is 2587031. The reversal of 2587021 is 1207852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2587021 - 2¹ = 2587019 is a prime.

It is a Duffinian number.

2587021 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2587001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556 + ... + 2341.

It is an arithmetic number, because the mean of its divisors is an integer number (347760).

2^2587021 is an apocalyptic number.

It is an amenable number.

2587021 is a deficient number, since it is larger than the sum of its proper divisors (195059).

2587021 is a wasteful number, since it uses less digits than its factorization.

2587021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2963.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 2587021 is about 1608.4218973889. The cubic root of 2587021 is about 137.2776969838.

The spelling of 2587021 in words is "two million, five hundred eighty-seven thousand, twenty-one".