2643291 has 12 divisors (see below), whose sum is σ = 4363632. Its totient is φ = 1510416.

The previous prime is 2643283. The next prime is 2643307. The reversal of 2643291 is 1923462.

2643291 = 428² + 429² + ... + 441².

2643291 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 2643291 - 2³ = 2643283 is a prime.

2643291 is a lucky 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 11 ways as a sum of consecutive naturals, for example, 20916 + ... + 21041.

It is an arithmetic number, because the mean of its divisors is an integer number (363636).

2^2643291 is an apocalyptic number.

2643291 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2643291 is a deficient number, since it is larger than the sum of its proper divisors (1720341).

2643291 is a wasteful number, since it uses less digits than its factorization.

2643291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41970 (or 41967 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 2643291 is about 1625.8201007492. The cubic root of 2643291 is about 138.2658705581.

The spelling of 2643291 in words is "two million, six hundred forty-three thousand, two hundred ninety-one".