2641643 has 4 divisors (see below), whose sum is σ = 2645568. Its totient is φ = 2637720.

The previous prime is 2641637. The next prime is 2641649. The reversal of 2641643 is 3461462.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2641637) and next prime (2641649).

It is a cyclic number.

It is not a de Polignac number, because 2641643 - 2¹⁶ = 2576107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2641649) 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, 668 + ... + 2393.

It is an arithmetic number, because the mean of its divisors is an integer number (661392).

2^2641643 is an apocalyptic number.

2641643 is a deficient number, since it is larger than the sum of its proper divisors (3925).

2641643 is an equidigital number, since it uses as much as digits as its factorization.

2641643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3924.

The product of its digits is 3456, while the sum is 26.

The square root of 2641643 is about 1625.3132005863. The cubic root of 2641643 is about 138.2371299306.

The spelling of 2641643 in words is "two million, six hundred forty-one thousand, six hundred forty-three".