445321 has 2 divisors, whose sum is σ = 445322. Its totient is φ = 445320.

The previous prime is 445307. The next prime is 445339. The reversal of 445321 is 123544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409600 + 35721 = 640^2 + 189^2 .

It is a cyclic number.

It is not a de Polignac number, because 445321 - 2¹¹ = 443273 is a prime.

It is not a weakly prime, because it can be changed into another prime (445021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222660 + 222661.

It is an arithmetic number, because the mean of its divisors is an integer number (222661).

2⁴⁴⁵³²¹ is an apocalyptic number.

It is an amenable number.

445321 is a deficient number, since it is larger than the sum of its proper divisors (1).

445321 is an equidigital number, since it uses as much as digits as its factorization.

445321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 19.

The square root of 445321 is about 667.3237595051. The cubic root of 445321 is about 76.3644201716.

Adding to 445321 its reverse (123544), we get a palindrome (568865).

It can be divided in two parts, 445 and 321, that multiplied together give a triangular number (142845 = T₅₃₄).

The spelling of 445321 in words is "four hundred forty-five thousand, three hundred twenty-one".