42782543 has 2 divisors, whose sum is σ = 42782544. Its totient is φ = 42782542.

The previous prime is 42782539. The next prime is 42782563. The reversal of 42782543 is 34528724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42782543 - 2² = 42782539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42782513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21391271 + 21391272.

It is an arithmetic number, because the mean of its divisors is an integer number (21391272).

Almost surely, 2^42782543 is an apocalyptic number.

42782543 is a deficient number, since it is larger than the sum of its proper divisors (1).

42782543 is an equidigital number, since it uses as much as digits as its factorization.

42782543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 35.

The square root of 42782543 is about 6540.8365672902. The cubic root of 42782543 is about 349.7482352686.

The spelling of 42782543 in words is "forty-two million, seven hundred eighty-two thousand, five hundred forty-three".