450005 has 4 divisors (see below), whose sum is σ = 540012. Its totient is φ = 360000.

The previous prime is 450001. The next prime is 450011. The reversal of 450005 is 500054.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500054 = 2 ⋅250027.

It can be written as a sum of positive squares in 2 ways, for example, as 358801 + 91204 = 599^2 + 302^2 .

It is not a de Polignac number, because 450005 - 2² = 450001 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450001) 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, 44996 + ... + 45005.

It is an arithmetic number, because the mean of its divisors is an integer number (135003).

2⁴⁵⁰⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

450005 is a deficient number, since it is larger than the sum of its proper divisors (90007).

450005 is an equidigital number, since it uses as much as digits as its factorization.

450005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90006.

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 450005 is about 670.8241200195. The cubic root of 450005 is about 76.6312270566.

Adding to 450005 its reverse (500054), we get a palindrome (950059).

The spelling of 450005 in words is "four hundred fifty thousand, five".