2544643 has 2 divisors, whose sum is σ = 2544644. Its totient is φ = 2544642.

The previous prime is 2544637. The next prime is 2544691. The reversal of 2544643 is 3464452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2544643 - 2⁹ = 2544131 is a prime.

It is not a weakly prime, because it can be changed into another prime (2544623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272321 + 1272322.

It is an arithmetic number, because the mean of its divisors is an integer number (1272322).

2^2544643 is an apocalyptic number.

2544643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2544643 is an equidigital number, since it uses as much as digits as its factorization.

2544643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 28.

The square root of 2544643 is about 1595.1937186436. The cubic root of 2544643 is about 136.5239842106.

The spelling of 2544643 in words is "two million, five hundred forty-four thousand, six hundred forty-three".