2582021 has 16 divisors (see below), whose sum is σ = 2956800. Its totient is φ = 2237760.

The previous prime is 2582009. The next prime is 2582029. The reversal of 2582021 is 1202852.

It is a cyclic number.

It is not a de Polignac number, because 2582021 - 2¹⁰ = 2580997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2581984 and 2582002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2582029) 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, 17255 + ... + 17403.

It is an arithmetic number, because the mean of its divisors is an integer number (184800).

2^2582021 is an apocalyptic number.

It is an amenable number.

2582021 is a deficient number, since it is larger than the sum of its proper divisors (374779).

2582021 is a wasteful number, since it uses less digits than its factorization.

2582021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2582021 is about 1606.8668270893. The cubic root of 2582021 is about 137.1891999364.

Adding to 2582021 its reverse (1202852), we get a palindrome (3784873).

The spelling of 2582021 in words is "two million, five hundred eighty-two thousand, twenty-one".