2684581 has 4 divisors (see below), whose sum is σ = 2722464. Its totient is φ = 2646700.

The previous prime is 2684551. The next prime is 2684587. The reversal of 2684581 is 1854862.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1854862 = 2 ⋅927431.

It is a cyclic number.

It is not a de Polignac number, because 2684581 - 2⁹ = 2684069 is a prime.

It is a super-2 number, since 2×2684581² = 14413950291122, 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 (2684587) 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, 18835 + ... + 18976.

It is an arithmetic number, because the mean of its divisors is an integer number (680616).

2^2684581 is an apocalyptic number.

It is an amenable number.

2684581 is a deficient number, since it is larger than the sum of its proper divisors (37883).

2684581 is an equidigital number, since it uses as much as digits as its factorization.

2684581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37882.

The product of its digits is 15360, while the sum is 34.

The square root of 2684581 is about 1638.4691025466. The cubic root of 2684581 is about 138.9820897166.

The spelling of 2684581 in words is "two million, six hundred eighty-four thousand, five hundred eighty-one".