6881641 has 4 divisors (see below), whose sum is σ = 7411012. Its totient is φ = 6352272.

The previous prime is 6881639. The next prime is 6881653. The reversal of 6881641 is 1461886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1461886 = 2 ⋅730943.

It can be written as a sum of positive squares in 2 ways, for example, as 2059225 + 4822416 = 1435^2 + 2196^2 .

It is a cyclic number.

It is not a de Polignac number, because 6881641 - 2¹ = 6881639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6881597 and 6881606.

It is not an unprimeable number, because it can be changed into a prime (6881041) 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, 264666 + ... + 264691.

It is an arithmetic number, because the mean of its divisors is an integer number (1852753).

Almost surely, 2^6881641 is an apocalyptic number.

It is an amenable number.

6881641 is a deficient number, since it is larger than the sum of its proper divisors (529371).

6881641 is a wasteful number, since it uses less digits than its factorization.

6881641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529370.

The product of its digits is 9216, while the sum is 34.

The square root of 6881641 is about 2623.2882037626. The cubic root of 6881641 is about 190.2088285647.

The spelling of 6881641 in words is "six million, eight hundred eighty-one thousand, six hundred forty-one".