6859985 has 16 divisors (see below), whose sum is σ = 9225792. Its totient is φ = 4852800.

The previous prime is 6859981. The next prime is 6859991. The reversal of 6859985 is 5899586.

6859985 = T₁₆₅₄ + T₁₆₅₅ + ... + T₁₆₅₈.

It is a happy number.

It is not a de Polignac number, because 6859985 - 2² = 6859981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6859981) 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 15 ways as a sum of consecutive naturals, for example, 350 + ... + 3720.

It is an arithmetic number, because the mean of its divisors is an integer number (576612).

Almost surely, 2^6859985 is an apocalyptic number.

It is an amenable number.

6859985 is a deficient number, since it is larger than the sum of its proper divisors (2365807).

6859985 is a wasteful number, since it uses less digits than its factorization.

6859985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424.

The product of its digits is 777600, while the sum is 50.

The square root of 6859985 is about 2619.1573072269. The cubic root of 6859985 is about 190.0090946708.

The spelling of 6859985 in words is "six million, eight hundred fifty-nine thousand, nine hundred eighty-five".