6761221 has 2 divisors, whose sum is σ = 6761222. Its totient is φ = 6761220.

The previous prime is 6761219. The next prime is 6761233. The reversal of 6761221 is 1221676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6558721 + 202500 = 2561^2 + 450^2 .

It is a cyclic number.

It is not a de Polignac number, because 6761221 - 2¹ = 6761219 is a prime.

Together with 6761219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6761281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3380610 + 3380611.

It is an arithmetic number, because the mean of its divisors is an integer number (3380611).

Almost surely, 2^6761221 is an apocalyptic number.

It is an amenable number.

6761221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6761221 is an equidigital number, since it uses as much as digits as its factorization.

6761221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 6761221 is about 2600.2347970904. The cubic root of 6761221 is about 189.0928222795.

Adding to 6761221 its reverse (1221676), we get a palindrome (7982897).

The spelling of 6761221 in words is "six million, seven hundred sixty-one thousand, two hundred twenty-one".