42543105 has 16 divisors (see below), whose sum is σ = 74257344. Its totient is φ = 20626880.

The previous prime is 42543101. The next prime is 42543113. The reversal of 42543105 is 50134524.

It is not a de Polignac number, because 42543105 - 2² = 42543101 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42543101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128754 + ... + 129083.

It is an arithmetic number, because the mean of its divisors is an integer number (4641084).

Almost surely, 2^42543105 is an apocalyptic number.

It is an amenable number.

42543105 is a deficient number, since it is larger than the sum of its proper divisors (31714239).

42543105 is a wasteful number, since it uses less digits than its factorization.

42543105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257856.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 42543105 is about 6522.5075699458. The cubic root of 42543105 is about 349.0945439432.

Adding to 42543105 its reverse (50134524), we get a palindrome (92677629).

The spelling of 42543105 in words is "forty-two million, five hundred forty-three thousand, one hundred five".