2841581 has 4 divisors (see below), whose sum is σ = 2965152. Its totient is φ = 2718012.

The previous prime is 2841557. The next prime is 2841589. The reversal of 2841581 is 1851482.

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: 1851482 = 2 ⋅925741.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2841581 is a prime.

It is a super-2 number, since 2×2841581² = 16149165159122, 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 (2841589) 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, 61751 + ... + 61796.

It is an arithmetic number, because the mean of its divisors is an integer number (741288).

2^2841581 is an apocalyptic number.

It is an amenable number.

2841581 is a deficient number, since it is larger than the sum of its proper divisors (123571).

2841581 is a wasteful number, since it uses less digits than its factorization.

2841581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123570.

The product of its digits is 2560, while the sum is 29.

The square root of 2841581 is about 1685.6989648214. The cubic root of 2841581 is about 141.6402485148.

Subtracting from 2841581 its reverse (1851482), we obtain a palindrome (990099).

The spelling of 2841581 in words is "two million, eight hundred forty-one thousand, five hundred eighty-one".