4395221 has 2 divisors, whose sum is σ = 4395222. Its totient is φ = 4395220.

The previous prime is 4395199. The next prime is 4395227. The reversal of 4395221 is 1225934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4202500 + 192721 = 2050^2 + 439^2 .

It is a cyclic number.

It is not a de Polignac number, because 4395221 - 2¹⁴ = 4378837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4395227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2197610 + 2197611.

It is an arithmetic number, because the mean of its divisors is an integer number (2197611).

Almost surely, 2^4395221 is an apocalyptic number.

It is an amenable number.

4395221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4395221 is an equidigital number, since it uses as much as digits as its factorization.

4395221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 4395221 is about 2096.4782374258. The cubic root of 4395221 is about 163.8049063200.

The spelling of 4395221 in words is "four million, three hundred ninety-five thousand, two hundred twenty-one".