7002221 has 2 divisors, whose sum is σ = 7002222. Its totient is φ = 7002220.

The previous prime is 7002217. The next prime is 7002223. The reversal of 7002221 is 1222007.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6817321 + 184900 = 2611^2 + 430^2 .

It is a cyclic number.

It is not a de Polignac number, because 7002221 - 2² = 7002217 is a prime.

It is a Sophie Germain prime.

Together with 7002223, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7002196 and 7002205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7002223) 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, 3501110 + 3501111.

It is an arithmetic number, because the mean of its divisors is an integer number (3501111).

Almost surely, 2^7002221 is an apocalyptic number.

It is an amenable number.

7002221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7002221 is an equidigital number, since it uses as much as digits as its factorization.

7002221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 7002221 is about 2646.1710073236. The cubic root of 7002221 is about 191.3133476624.

Adding to 7002221 its reverse (1222007), we get a palindrome (8224228).

The spelling of 7002221 in words is "seven million, two thousand, two hundred twenty-one".