42005447 has 8 divisors (see below), whose sum is σ = 48236160. Its totient is φ = 36176760.

The previous prime is 42005423. The next prime is 42005459. The reversal of 42005447 is 74450024.

42005447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42005447 - 2⁸ = 42005191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42005417) 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 7 ways as a sum of consecutive naturals, for example, 100283 + ... + 100700.

It is an arithmetic number, because the mean of its divisors is an integer number (6029520).

Almost surely, 2^42005447 is an apocalyptic number.

42005447 is a deficient number, since it is larger than the sum of its proper divisors (6230713).

42005447 is a wasteful number, since it uses less digits than its factorization.

42005447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201013.

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 42005447 is about 6481.1609299569. The cubic root of 42005447 is about 347.6176907574.

The spelling of 42005447 in words is "forty-two million, five thousand, four hundred forty-seven".