445945 has 4 divisors (see below), whose sum is σ = 535140. Its totient is φ = 356752.

The previous prime is 445943. The next prime is 445967. The reversal of 445945 is 549544.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 95481 + 350464 = 309^2 + 592^2 .

It is a cyclic number.

It is not a de Polignac number, because 445945 - 2¹ = 445943 is a prime.

445945 is a lucky number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (445943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44590 + ... + 44599.

It is an arithmetic number, because the mean of its divisors is an integer number (133785).

2⁴⁴⁵⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

445945 is a deficient number, since it is larger than the sum of its proper divisors (89195).

445945 is an equidigital number, since it uses as much as digits as its factorization.

445945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89194.

The product of its digits is 14400, while the sum is 31.

The square root of 445945 is about 667.7911350115. The cubic root of 445945 is about 76.4000717268.

The spelling of 445945 in words is "four hundred forty-five thousand, nine hundred forty-five".