4497221 has 2 divisors, whose sum is σ = 4497222. Its totient is φ = 4497220.

The previous prime is 4497217. The next prime is 4497223. The reversal of 4497221 is 1227944.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2280100 + 2217121 = 1510^2 + 1489^2 .

It is a cyclic number.

It is not a de Polignac number, because 4497221 - 2² = 4497217 is a prime.

Together with 4497223, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₃₁₅₇₇₆ and since 4497221 and 315776 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4497223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2248610 + 2248611.

It is an arithmetic number, because the mean of its divisors is an integer number (2248611).

Almost surely, 2^4497221 is an apocalyptic number.

It is an amenable number.

4497221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4497221 is an equidigital number, since it uses as much as digits as its factorization.

4497221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 4497221 is about 2120.6652258195. The cubic root of 4497221 is about 165.0623700544.

It can be divided in two parts, 44 and 97221, that multiplied together give a palindrome (4277724).

The spelling of 4497221 in words is "four million, four hundred ninety-seven thousand, two hundred twenty-one".