2643261 has 16 divisors (see below), whose sum is σ = 3763200. Its totient is φ = 1645488.

The previous prime is 2643247. The next prime is 2643283. The reversal of 2643261 is 1623462.

2643261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2643261 - 2⁷ = 2643133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643241) 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 15 ways as a sum of consecutive naturals, for example, 4210 + ... + 4796.

It is an arithmetic number, because the mean of its divisors is an integer number (235200).

2^2643261 is an apocalyptic number.

It is an amenable number.

2643261 is a deficient number, since it is larger than the sum of its proper divisors (1119939).

2643261 is a wasteful number, since it uses less digits than its factorization.

2643261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688.

The product of its digits is 1728, while the sum is 24.

The square root of 2643261 is about 1625.8108746100. The cubic root of 2643261 is about 138.2653474738.

The spelling of 2643261 in words is "two million, six hundred forty-three thousand, two hundred sixty-one".