6789121 has 2 divisors, whose sum is σ = 6789122. Its totient is φ = 6789120.

The previous prime is 6789089. The next prime is 6789143. The reversal of 6789121 is 1219876.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6558721 + 230400 = 2561^2 + 480^2 .

It is a cyclic number.

It is not a de Polignac number, because 6789121 - 2⁵ = 6789089 is a prime.

6789121 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6789191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3394560 + 3394561.

It is an arithmetic number, because the mean of its divisors is an integer number (3394561).

Almost surely, 2^6789121 is an apocalyptic number.

It is an amenable number.

6789121 is a deficient number, since it is larger than the sum of its proper divisors (1).

6789121 is an equidigital number, since it uses as much as digits as its factorization.

6789121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 34.

The square root of 6789121 is about 2605.5941740801. The cubic root of 6789121 is about 189.3525608518.

The spelling of 6789121 in words is "six million, seven hundred eighty-nine thousand, one hundred twenty-one".