8142805 has 32 divisors (see below), whose sum is σ = 11467008. Its totient is φ = 5491200.

The previous prime is 8142803. The next prime is 8142809. The reversal of 8142805 is 5082418.

8142805 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8142805 - 2¹ = 8142803 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 (8142803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51787 + ... + 51943.

It is an arithmetic number, because the mean of its divisors is an integer number (358344).

Almost surely, 2^8142805 is an apocalyptic number.

It is an amenable number.

8142805 is a deficient number, since it is larger than the sum of its proper divisors (3324203).

8142805 is a wasteful number, since it uses less digits than its factorization.

8142805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 8142805 is about 2853.5600571917. The cubic root of 8142805 is about 201.1830300683.

The spelling of 8142805 in words is "eight million, one hundred forty-two thousand, eight hundred five".