42806807 has 4 divisors (see below), whose sum is σ = 43199640. Its totient is φ = 42413976.

The previous prime is 42806789. The next prime is 42806831. The reversal of 42806807 is 70860824.

42806807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42806807 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 (42806837) 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, 196253 + ... + 196470.

It is an arithmetic number, because the mean of its divisors is an integer number (10799910).

Almost surely, 2^42806807 is an apocalyptic number.

42806807 is a deficient number, since it is larger than the sum of its proper divisors (392833).

42806807 is a wasteful number, since it uses less digits than its factorization.

42806807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392832.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 42806807 is about 6542.6911129901. The cubic root of 42806807 is about 349.8143423516.

The spelling of 42806807 in words is "forty-two million, eight hundred six thousand, eight hundred seven".