445605521 has 2 divisors, whose sum is σ = 445605522. Its totient is φ = 445605520.

The previous prime is 445605497. The next prime is 445605527. The reversal of 445605521 is 125506544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419799121 + 25806400 = 20489^2 + 5080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445605521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (445605527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222802760 + 222802761.

It is an arithmetic number, because the mean of its divisors is an integer number (222802761).

Almost surely, 2^445605521 is an apocalyptic number.

It is an amenable number.

445605521 is a deficient number, since it is larger than the sum of its proper divisors (1).

445605521 is an equidigital number, since it uses as much as digits as its factorization.

445605521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 445605521 is about 21109.3704548478. The cubic root of 445605521 is about 763.8068009468.

The spelling of 445605521 in words is "four hundred forty-five million, six hundred five thousand, five hundred twenty-one".