6881261 has 2 divisors, whose sum is σ = 6881262. Its totient is φ = 6881260.

The previous prime is 6881257. The next prime is 6881263. The reversal of 6881261 is 1621886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5175625 + 1705636 = 2275^2 + 1306^2 .

It is a cyclic number.

It is not a de Polignac number, because 6881261 - 2² = 6881257 is a prime.

Together with 6881263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6881263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3440630 + 3440631.

It is an arithmetic number, because the mean of its divisors is an integer number (3440631).

Almost surely, 2^6881261 is an apocalyptic number.

It is an amenable number.

6881261 is a deficient number, since it is larger than the sum of its proper divisors (1).

6881261 is an equidigital number, since it uses as much as digits as its factorization.

6881261 is an odious number, because the sum of its binary digits is odd.

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

The square root of 6881261 is about 2623.2157745790. The cubic root of 6881261 is about 190.2053274286.

The spelling of 6881261 in words is "six million, eight hundred eighty-one thousand, two hundred sixty-one".