447221 has 2 divisors, whose sum is σ = 447222. Its totient is φ = 447220.

The previous prime is 447217. The next prime is 447233. The reversal of 447221 is 122744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376996 + 70225 = 614^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 447221 - 2² = 447217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 447193 and 447202.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 447221.

It is not a weakly prime, because it can be changed into another prime (447211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223610 + 223611.

It is an arithmetic number, because the mean of its divisors is an integer number (223611).

2⁴⁴⁷²²¹ is an apocalyptic number.

It is an amenable number.

447221 is a deficient number, since it is larger than the sum of its proper divisors (1).

447221 is an equidigital number, since it uses as much as digits as its factorization.

447221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 448, while the sum is 20.

The square root of 447221 is about 668.7458411086. The cubic root of 447221 is about 76.4728711814.

Adding to 447221 its reverse (122744), we get a palindrome (569965).

The spelling of 447221 in words is "four hundred forty-seven thousand, two hundred twenty-one", and thus it is an iban number.