42405543 has 12 divisors (see below), whose sum is σ = 61644648. Its totient is φ = 28089360.

The previous prime is 42405527. The next prime is 42405619. The reversal of 42405543 is 34550424.

42405543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42405543 - 2⁴ = 42405527 is a prime.

It is a super-3 number, since 3×42405543³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42405523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13593 + ... + 16418.

It is an arithmetic number, because the mean of its divisors is an integer number (5137054).

Almost surely, 2^42405543 is an apocalyptic number.

42405543 is a deficient number, since it is larger than the sum of its proper divisors (19239105).

42405543 is a wasteful number, since it uses less digits than its factorization.

42405543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30174 (or 30171 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 42405543 is about 6511.9538542591. The cubic root of 42405543 is about 348.7178750230.

Adding to 42405543 its reverse (34550424), we get a palindrome (76955967).

The spelling of 42405543 in words is "forty-two million, four hundred five thousand, five hundred forty-three".