42805851 has 8 divisors (see below), whose sum is σ = 62263104. Its totient is φ = 25942920.

The previous prime is 42805849. The next prime is 42805877. The reversal of 42805851 is 15850824.

42805851 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 42805851 - 2¹ = 42805849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 1297147 = 42805851 / (4 + 2 + 8 + 0 + 5 + 8 + 5 + 1).

It is not an unprimeable number, because it can be changed into a prime (42805811) 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, 648541 + ... + 648606.

It is an arithmetic number, because the mean of its divisors is an integer number (7782888).

Almost surely, 2^42805851 is an apocalyptic number.

42805851 is a deficient number, since it is larger than the sum of its proper divisors (19457253).

42805851 is a wasteful number, since it uses less digits than its factorization.

42805851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297161.

The product of its (nonzero) digits is 12800, while the sum is 33.

The square root of 42805851 is about 6542.6180539597. The cubic root of 42805851 is about 349.8117382096.

The spelling of 42805851 in words is "forty-two million, eight hundred five thousand, eight hundred fifty-one".