42785906 has 8 divisors (see below), whose sum is σ = 67954140. Its totient is φ = 20134528.

The previous prime is 42785887. The next prime is 42785909. The reversal of 42785906 is 60958724.

42785906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 42784681 + 1225 = 6541^2 + 35^2 .

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

It is not an unprimeable number, because it can be changed into a prime (42785909) 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 3 ways as a sum of consecutive naturals, for example, 629171 + ... + 629238.

Almost surely, 2^42785906 is an apocalyptic number.

42785906 is a deficient number, since it is larger than the sum of its proper divisors (25168234).

42785906 is a wasteful number, since it uses less digits than its factorization.

42785906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258428.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 42785906 is about 6541.0936394459. The cubic root of 42785906 is about 349.7573992283.

The spelling of 42785906 in words is "forty-two million, seven hundred eighty-five thousand, nine hundred six".