445405 has 8 divisors (see below), whose sum is σ = 538200. Its totient is φ = 353856.

The previous prime is 445363. The next prime is 445427. The reversal of 445405 is 504544.

It can be written as a sum of positive squares in 4 ways, for example, as 81796 + 363609 = 286^2 + 603^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 445405 - 2⁹ = 444893 is a prime.

It is a super-2 number, since 2×445405² = 396771228050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 951 + ... + 1339.

It is an arithmetic number, because the mean of its divisors is an integer number (67275).

2⁴⁴⁵⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

445405 is a deficient number, since it is larger than the sum of its proper divisors (92795).

445405 is a wasteful number, since it uses less digits than its factorization.

445405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 445405 is about 667.3866945033. The cubic root of 445405 is about 76.3692213585.

Adding to 445405 its reverse (504544), we get a palindrome (949949).

The spelling of 445405 in words is "four hundred forty-five thousand, four hundred five".