450865 has 4 divisors (see below), whose sum is σ = 541044. Its totient is φ = 360688.

The previous prime is 450859. The next prime is 450881. The reversal of 450865 is 568054.

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 312481 + 138384 = 559^2 + 372^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450865 is a prime.

It is an Ulam number.

It is a Duffinian number.

450865 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45082 + ... + 45091.

It is an arithmetic number, because the mean of its divisors is an integer number (135261).

2⁴⁵⁰⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

450865 is a deficient number, since it is larger than the sum of its proper divisors (90179).

450865 is an equidigital number, since it uses as much as digits as its factorization.

450865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90178.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 450865 is about 671.4648166509. The cubic root of 450865 is about 76.6800123795.

The spelling of 450865 in words is "four hundred fifty thousand, eight hundred sixty-five".