6842621 has 2 divisors, whose sum is σ = 6842622. Its totient is φ = 6842620.

The previous prime is 6842617. The next prime is 6842629. The reversal of 6842621 is 1262486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5428900 + 1413721 = 2330^2 + 1189^2 .

It is a cyclic number.

It is not a de Polignac number, because 6842621 - 2² = 6842617 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6842629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3421310 + 3421311.

It is an arithmetic number, because the mean of its divisors is an integer number (3421311).

Almost surely, 2^6842621 is an apocalyptic number.

It is an amenable number.

6842621 is a deficient number, since it is larger than the sum of its proper divisors (1).

6842621 is an equidigital number, since it uses as much as digits as its factorization.

6842621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 29.

The square root of 6842621 is about 2615.8404003303. The cubic root of 6842621 is about 189.8486421535.

The spelling of 6842621 in words is "six million, eight hundred forty-two thousand, six hundred twenty-one".