427855 has 4 divisors (see below), whose sum is σ = 513432. Its totient is φ = 342280.

The previous prime is 427849. The next prime is 427859. The reversal of 427855 is 558724.

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

It is not a de Polignac number, because 427855 - 2⁷ = 427727 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 (427859) 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, 42781 + ... + 42790.

It is an arithmetic number, because the mean of its divisors is an integer number (128358).

2⁴²⁷⁸⁵⁵ is an apocalyptic number.

427855 is a deficient number, since it is larger than the sum of its proper divisors (85577).

427855 is an equidigital number, since it uses as much as digits as its factorization.

427855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85576.

The product of its digits is 11200, while the sum is 31.

The square root of 427855 is about 654.1062604807. The cubic root of 427855 is about 75.3527090545.

It can be divided in two parts, 427 and 855, that multiplied together give a triangular number (365085 = T₈₅₄).

The spelling of 427855 in words is "four hundred twenty-seven thousand, eight hundred fifty-five".