6881257 has 2 divisors, whose sum is σ = 6881258. Its totient is φ = 6881256.

The previous prime is 6881239. The next prime is 6881261. The reversal of 6881257 is 7521886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4260096 + 2621161 = 2064^2 + 1619^2 .

It is a cyclic number.

It is not a de Polignac number, because 6881257 - 2¹⁹ = 6356969 is a prime.

It is not a weakly prime, because it can be changed into another prime (6881057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3440628 + 3440629.

It is an arithmetic number, because the mean of its divisors is an integer number (3440629).

Almost surely, 2^6881257 is an apocalyptic number.

It is an amenable number.

6881257 is a deficient number, since it is larger than the sum of its proper divisors (1).

6881257 is an equidigital number, since it uses as much as digits as its factorization.

6881257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 37.

The square root of 6881257 is about 2623.2150121559. The cubic root of 6881257 is about 190.2052905738.

The spelling of 6881257 in words is "six million, eight hundred eighty-one thousand, two hundred fifty-seven".