6924221 has 2 divisors, whose sum is σ = 6924222. Its totient is φ = 6924220.

The previous prime is 6924193. The next prime is 6924223. The reversal of 6924221 is 1224296.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3556996 + 3367225 = 1886^2 + 1835^2 .

It is a cyclic number.

It is not a de Polignac number, because 6924221 - 2¹⁰ = 6923197 is a prime.

Together with 6924223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6924223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3462110 + 3462111.

It is an arithmetic number, because the mean of its divisors is an integer number (3462111).

Almost surely, 2^6924221 is an apocalyptic number.

It is an amenable number.

6924221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6924221 is an equidigital number, since it uses as much as digits as its factorization.

6924221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 6924221 is about 2631.3914570052. The cubic root of 6924221 is about 190.6003265028.

It can be divided in two parts, 692 and 4221, that added together give a cube (4913 = 17³).

The spelling of 6924221 in words is "six million, nine hundred twenty-four thousand, two hundred twenty-one".