42205043 has 4 divisors (see below), whose sum is σ = 43566528. Its totient is φ = 40843560.

The previous prime is 42205019. The next prime is 42205073. The reversal of 42205043 is 34050224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42205043 - 2⁶ = 42204979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42205003) 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 3 ways as a sum of consecutive naturals, for example, 680696 + ... + 680757.

It is an arithmetic number, because the mean of its divisors is an integer number (10891632).

Almost surely, 2^42205043 is an apocalyptic number.

42205043 is a deficient number, since it is larger than the sum of its proper divisors (1361485).

42205043 is a wasteful number, since it uses less digits than its factorization.

42205043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361484.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 42205043 is about 6496.5408487902. The cubic root of 42205043 is about 348.1674091039.

Adding to 42205043 its reverse (34050224), we get a palindrome (76255267).

The spelling of 42205043 in words is "forty-two million, two hundred five thousand, forty-three".