6812681 has 4 divisors (see below), whose sum is σ = 6820164. Its totient is φ = 6805200.

The previous prime is 6812633. The next prime is 6812693. The reversal of 6812681 is 1862186.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3168400 + 3644281 = 1780^2 + 1909^2 .

It is a cyclic number.

It is not a de Polignac number, because 6812681 - 2¹⁴ = 6796297 is a prime.

It is a super-2 number, since 2×6812681² = 92825244815522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6812381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2150 + ... + 4271.

It is an arithmetic number, because the mean of its divisors is an integer number (1705041).

Almost surely, 2^6812681 is an apocalyptic number.

It is an amenable number.

6812681 is a deficient number, since it is larger than the sum of its proper divisors (7483).

6812681 is a wasteful number, since it uses less digits than its factorization.

6812681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7482.

The product of its digits is 4608, while the sum is 32.

The square root of 6812681 is about 2610.1113003089. Note that the first 3 decimals coincide. The cubic root of 6812681 is about 189.5713420370.

The spelling of 6812681 in words is "six million, eight hundred twelve thousand, six hundred eighty-one".