406855 has 4 divisors (see below), whose sum is σ = 488232. Its totient is φ = 325480.

The previous prime is 406837. The next prime is 406859. The reversal of 406855 is 558604.

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

It is not a de Polignac number, because 406855 - 2¹⁷ = 275783 is a prime.

It is a Duffinian number.

406855 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40681 + ... + 40690.

It is an arithmetic number, because the mean of its divisors is an integer number (122058).

2⁴⁰⁶⁸⁵⁵ is an apocalyptic number.

406855 is a deficient number, since it is larger than the sum of its proper divisors (81377).

406855 is an equidigital number, since it uses as much as digits as its factorization.

406855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81376.

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

The square root of 406855 is about 637.8518636800. The cubic root of 406855 is about 74.0991488104.

The spelling of 406855 in words is "four hundred six thousand, eight hundred fifty-five".