801111 has 4 divisors (see below), whose sum is σ = 1068152. Its totient is φ = 534072.

The previous prime is 801107. The next prime is 801127. The reversal of 801111 is 111108.

It is a happy number.

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

It is not a de Polignac number, because 801111 - 2² = 801107 is a prime.

It is a D-number.

It is a Duffinian number.

801111 is a modest number, since divided by 1111 gives 80 as remainder.

801111 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801011) 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, 133516 + ... + 133521.

It is an arithmetic number, because the mean of its divisors is an integer number (267038).

2⁸⁰¹¹¹¹ is an apocalyptic number.

801111 is a deficient number, since it is larger than the sum of its proper divisors (267041).

801111 is a wasteful number, since it uses less digits than its factorization.

801111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267040.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 801111 is about 895.0480434033. The cubic root of 801111 is about 92.8747301711.

Adding to 801111 its reverse (111108), we get a palindrome (912219).

The spelling of 801111 in words is "eight hundred one thousand, one hundred eleven".