2815841 has 4 divisors (see below), whose sum is σ = 3218112. Its totient is φ = 2413572.

The previous prime is 2815807. The next prime is 2815843. The reversal of 2815841 is 1485182.

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: 1485182 = 2 ⋅742591.

It is not a de Polignac number, because 2815841 - 2¹⁰ = 2814817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2815843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201125 + ... + 201138.

It is an arithmetic number, because the mean of its divisors is an integer number (804528).

2^2815841 is an apocalyptic number.

It is an amenable number.

2815841 is a deficient number, since it is larger than the sum of its proper divisors (402271).

2815841 is an equidigital number, since it uses as much as digits as its factorization.

2815841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402270.

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

The square root of 2815841 is about 1678.0467812311. The cubic root of 2815841 is about 141.2112755724.

The spelling of 2815841 in words is "two million, eight hundred fifteen thousand, eight hundred forty-one".