447021 has 6 divisors (see below), whose sum is σ = 645710. Its totient is φ = 298008.

The previous prime is 447019. The next prime is 447053. The reversal of 447021 is 120744.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 275625 + 171396 = 525^2 + 414^2 .

It is not a de Polignac number, because 447021 - 2¹ = 447019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 446985 and 447003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24826 + ... + 24843.

2⁴⁴⁷⁰²¹ is an apocalyptic number.

It is an amenable number.

447021 is a deficient number, since it is larger than the sum of its proper divisors (198689).

447021 is a wasteful number, since it uses less digits than its factorization.

447021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49675 (or 49672 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 447021 is about 668.5962907465. The cubic root of 447021 is about 76.4614697678.

Adding to 447021 its reverse (120744), we get a palindrome (567765).

The spelling of 447021 in words is "four hundred forty-seven thousand, twenty-one", and thus it is an iban number.