8143985 has 8 divisors (see below), whose sum is σ = 10000320. Its totient is φ = 6363504.

The previous prime is 8143939. The next prime is 8143987. The reversal of 8143985 is 5893418.

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

It is a cyclic number.

It is not a de Polignac number, because 8143985 - 2⁶ = 8143921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8143987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18725 + ... + 19154.

It is an arithmetic number, because the mean of its divisors is an integer number (1250040).

Almost surely, 2^8143985 is an apocalyptic number.

It is an amenable number.

8143985 is a deficient number, since it is larger than the sum of its proper divisors (1856335).

8143985 is a wasteful number, since it uses less digits than its factorization.

8143985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37927.

The product of its digits is 34560, while the sum is 38.

The square root of 8143985 is about 2853.7668089737. The cubic root of 8143985 is about 201.1927476250.

The spelling of 8143985 in words is "eight million, one hundred forty-three thousand, nine hundred eighty-five".