447521 has 2 divisors, whose sum is σ = 447522. Its totient is φ = 447520.

The previous prime is 447509. The next prime is 447527. The reversal of 447521 is 125744.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 429025 + 18496 = 655^2 + 136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-447521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (447527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223760 + 223761.

It is an arithmetic number, because the mean of its divisors is an integer number (223761).

2⁴⁴⁷⁵²¹ is an apocalyptic number.

It is an amenable number.

447521 is a deficient number, since it is larger than the sum of its proper divisors (1).

447521 is an equidigital number, since it uses as much as digits as its factorization.

447521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1120, while the sum is 23.

The square root of 447521 is about 668.9701039658. The cubic root of 447521 is about 76.4899669300.

The spelling of 447521 in words is "four hundred forty-seven thousand, five hundred twenty-one".