2543841 has 12 divisors (see below), whose sum is σ = 3744468. Its totient is φ = 1663584.

The previous prime is 2543833. The next prime is 2543843. The reversal of 2543841 is 1483452.

It can be written as a sum of positive squares in 2 ways, for example, as 2313441 + 230400 = 1521^2 + 480^2 .

It is not a de Polignac number, because 2543841 - 2³ = 2543833 is a prime.

It is a super-2 number, since 2×2543841² = 12942254066562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2190 + ... + 3143.

It is an arithmetic number, because the mean of its divisors is an integer number (312039).

2^2543841 is an apocalyptic number.

It is an amenable number.

2543841 is a deficient number, since it is larger than the sum of its proper divisors (1200627).

2543841 is a wasteful number, since it uses less digits than its factorization.

2543841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5392 (or 5389 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 2543841 is about 1594.9423187062. The cubic root of 2543841 is about 136.5096398618.

It can be divided in two parts, 254 and 3841, that added together give a triangular number (4095 = T₉₀).

The spelling of 2543841 in words is "two million, five hundred forty-three thousand, eight hundred forty-one".