2000581 has 4 divisors (see below), whose sum is σ = 2182464. Its totient is φ = 1818700.

The previous prime is 2000573. The next prime is 2000597. The reversal of 2000581 is 1850002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2000581 - 2³ = 2000573 is a prime.

It is a super-2 number, since 2×2000581² = 8004648675122, 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 (2000521) 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 in 3 ways as a sum of consecutive naturals, for example, 90925 + ... + 90946.

It is an arithmetic number, because the mean of its divisors is an integer number (545616).

2^2000581 is an apocalyptic number.

It is an amenable number.

2000581 is a deficient number, since it is larger than the sum of its proper divisors (181883).

2000581 is a wasteful number, since it uses less digits than its factorization.

2000581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181882.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2000581 is about 1414.4189619770. The cubic root of 2000581 is about 126.0043040438.

Adding to 2000581 its reverse (1850002), we get a palindrome (3850583).

The spelling of 2000581 in words is "two million, five hundred eighty-one", and thus it is an aban number.