2084581 has 4 divisors (see below), whose sum is σ = 2087500. Its totient is φ = 2081664.

The previous prime is 2084569. The next prime is 2084609. The reversal of 2084581 is 1854802.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 982081 + 1102500 = 991^2 + 1050^2 .

It is a cyclic number.

It is not a de Polignac number, because 2084581 - 2¹⁷ = 1953509 is a prime.

It is a super-2 number, since 2×2084581² = 8690955891122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2084501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415 + ... + 2083.

It is an arithmetic number, because the mean of its divisors is an integer number (521875).

2^2084581 is an apocalyptic number.

It is an amenable number.

2084581 is a deficient number, since it is larger than the sum of its proper divisors (2919).

2084581 is a wasteful number, since it uses less digits than its factorization.

2084581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 2084581 is about 1443.8078126953. The cubic root of 2084581 is about 127.7437296105.

The spelling of 2084581 in words is "two million, eighty-four thousand, five hundred eighty-one".