8145805 has 16 divisors (see below), whose sum is σ = 10575360. Its totient is φ = 5999872.

The previous prime is 8145773. The next prime is 8145811. The reversal of 8145805 is 5085418.

It is a cyclic number.

It is not a de Polignac number, because 8145805 - 2⁵ = 8145773 is a prime.

8145805 is a lucky number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 2976 + ... + 5014.

It is an arithmetic number, because the mean of its divisors is an integer number (660960).

Almost surely, 2^8145805 is an apocalyptic number.

8145805 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8145805 is a deficient number, since it is larger than the sum of its proper divisors (2429555).

8145805 is a wasteful number, since it uses less digits than its factorization.

8145805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 8145805 is about 2854.0856679504. The cubic root of 8145805 is about 201.2077338808.

The spelling of 8145805 in words is "eight million, one hundred forty-five thousand, eight hundred five".