42851906 has 8 divisors (see below), whose sum is σ = 64431804. Its totient is φ = 21374640.

The previous prime is 42851899. The next prime is 42851911. The reversal of 42851906 is 60915824.

42851906 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 23571025 + 19280881 = 4855^2 + 4391^2 .

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

It is an unprimeable number.

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, 24605 + ... + 26288.

Almost surely, 2^42851906 is an apocalyptic number.

42851906 is a deficient number, since it is larger than the sum of its proper divisors (21579898).

42851906 is a wasteful number, since it uses less digits than its factorization.

42851906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51316.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 42851906 is about 6546.1367232895. The cubic root of 42851906 is about 349.9371478975.

The spelling of 42851906 in words is "forty-two million, eight hundred fifty-one thousand, nine hundred six".