6881985 has 24 divisors (see below), whose sum is σ = 13014144. Its totient is φ = 3336480.

The previous prime is 6881981. The next prime is 6881989. The reversal of 6881985 is 5891886.

It is an interprime number because it is at equal distance from previous prime (6881981) and next prime (6881989).

It is not a de Polignac number, because 6881985 - 2² = 6881981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6881985.

It is not an unprimeable number, because it can be changed into a prime (6881981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6457 + ... + 7446.

It is an arithmetic number, because the mean of its divisors is an integer number (542256).

Almost surely, 2^6881985 is an apocalyptic number.

It is an amenable number.

6881985 is a deficient number, since it is larger than the sum of its proper divisors (6132159).

6881985 is a wasteful number, since it uses less digits than its factorization.

6881985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13925 (or 13922 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The square root of 6881985 is about 2623.3537695096. The cubic root of 6881985 is about 190.2119979030.

Subtracting from 6881985 its reverse (5891886), we obtain a palindrome (990099).

The spelling of 6881985 in words is "six million, eight hundred eighty-one thousand, nine hundred eighty-five".