800155 has 4 divisors (see below), whose sum is σ = 960192. Its totient is φ = 640120.

The previous prime is 800143. The next prime is 800159. The reversal of 800155 is 551008.

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

It is not a de Polignac number, because 800155 - 2⁵ = 800123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (800159) 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, 80011 + ... + 80020.

It is an arithmetic number, because the mean of its divisors is an integer number (240048).

2⁸⁰⁰¹⁵⁵ is an apocalyptic number.

800155 is a deficient number, since it is larger than the sum of its proper divisors (160037).

800155 is a wasteful number, since it uses less digits than its factorization.

800155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160036.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 800155 is about 894.5138344375. The cubic root of 800155 is about 92.8377716707.

The spelling of 800155 in words is "eight hundred thousand, one hundred fifty-five".