6621841 has 2 divisors, whose sum is σ = 6621842. Its totient is φ = 6621840.

The previous prime is 6621833. The next prime is 6621847. The reversal of 6621841 is 1481266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6350400 + 271441 = 2520^2 + 521^2 .

It is a cyclic number.

It is not a de Polignac number, because 6621841 - 2³ = 6621833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6621847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310920 + 3310921.

It is an arithmetic number, because the mean of its divisors is an integer number (3310921).

Almost surely, 2^6621841 is an apocalyptic number.

It is an amenable number.

6621841 is a deficient number, since it is larger than the sum of its proper divisors (1).

6621841 is an equidigital number, since it uses as much as digits as its factorization.

6621841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 6621841 is about 2573.2938036688. The cubic root of 6621841 is about 187.7844311243.

The spelling of 6621841 in words is "six million, six hundred twenty-one thousand, eight hundred forty-one".