42135543 has 6 divisors (see below), whose sum is σ = 60862464. Its totient is φ = 28090356.

The previous prime is 42135523. The next prime is 42135551. The reversal of 42135543 is 34553124.

It is not a de Polignac number, because 42135543 - 2⁹ = 42135031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42135523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2340855 + ... + 2340872.

It is an arithmetic number, because the mean of its divisors is an integer number (10143744).

Almost surely, 2^42135543 is an apocalyptic number.

42135543 is a deficient number, since it is larger than the sum of its proper divisors (18726921).

42135543 is a wasteful number, since it uses less digits than its factorization.

42135543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4681733 (or 4681730 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 42135543 is about 6491.1896444334. The cubic root of 42135543 is about 347.9761923864.

Adding to 42135543 its reverse (34553124), we get a palindrome (76688667).

The spelling of 42135543 in words is "forty-two million, one hundred thirty-five thousand, five hundred forty-three".