42543705 has 16 divisors (see below), whose sum is σ = 68177664. Its totient is φ = 22654080.

The previous prime is 42543701. The next prime is 42543713. The reversal of 42543705 is 50734524.

It is not a de Polignac number, because 42543705 - 2² = 42543701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42543701) 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 in 15 ways as a sum of consecutive naturals, for example, 9552 + ... + 13278.

It is an arithmetic number, because the mean of its divisors is an integer number (4261104).

Almost surely, 2^42543705 is an apocalyptic number.

It is an amenable number.

42543705 is a deficient number, since it is larger than the sum of its proper divisors (25633959).

42543705 is a wasteful number, since it uses less digits than its factorization.

42543705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4496.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 42543705 is about 6522.5535643642. The cubic root of 42543705 is about 349.0961850689.

The spelling of 42543705 in words is "forty-two million, five hundred forty-three thousand, seven hundred five".