2642543 has 2 divisors, whose sum is σ = 2642544. Its totient is φ = 2642542.

The previous prime is 2642537. The next prime is 2642561. The reversal of 2642543 is 3452462.

2642543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2642543 - 2⁸ = 2642287 is a prime.

It is a Chen prime.

It is equal to p₁₉₂₇₄₃ and since 2642543 and 192743 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2642513) 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 as a sum of consecutive naturals, namely, 1321271 + 1321272.

It is an arithmetic number, because the mean of its divisors is an integer number (1321272).

2^2642543 is an apocalyptic number.

2642543 is a deficient number, since it is larger than the sum of its proper divisors (1).

2642543 is an equidigital number, since it uses as much as digits as its factorization.

2642543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 26.

The square root of 2642543 is about 1625.5900467215. The cubic root of 2642543 is about 138.2528271426.

The spelling of 2642543 in words is "two million, six hundred forty-two thousand, five hundred forty-three".