451855 has 4 divisors (see below), whose sum is σ = 542232. Its totient is φ = 361480.

The previous prime is 451837. The next prime is 451859. The reversal of 451855 is 558154.

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

It is not a de Polignac number, because 451855 - 2⁵ = 451823 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45181 + ... + 45190.

It is an arithmetic number, because the mean of its divisors is an integer number (135558).

2⁴⁵¹⁸⁵⁵ is an apocalyptic number.

451855 is a deficient number, since it is larger than the sum of its proper divisors (90377).

451855 is an equidigital number, since it uses as much as digits as its factorization.

451855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90376.

The product of its digits is 4000, while the sum is 28.

The square root of 451855 is about 672.2016066628. The cubic root of 451855 is about 76.7360954769.

The spelling of 451855 in words is "four hundred fifty-one thousand, eight hundred fifty-five".