7065221 has 2 divisors, whose sum is σ = 7065222. Its totient is φ = 7065220.

The previous prime is 7065211. The next prime is 7065229. The reversal of 7065221 is 1225607.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3568321 + 3496900 = 1889^2 + 1870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7065221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7065229) 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, 3532610 + 3532611.

It is an arithmetic number, because the mean of its divisors is an integer number (3532611).

Almost surely, 2^7065221 is an apocalyptic number.

It is an amenable number.

7065221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7065221 is an equidigital number, since it uses as much as digits as its factorization.

7065221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 7065221 is about 2658.0483441804. The cubic root of 7065221 is about 191.8853934818.

The spelling of 7065221 in words is "seven million, sixty-five thousand, two hundred twenty-one".