801091 has 4 divisors (see below), whose sum is σ = 848232. Its totient is φ = 753952.

The previous prime is 801079. The next prime is 801103. The reversal of 801091 is 190108.

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

It is an interprime number because it is at equal distance from previous prime (801079) and next prime (801103).

It is a cyclic number.

It is not a de Polignac number, because 801091 - 2¹⁵ = 768323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (801001) 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, 23545 + ... + 23578.

It is an arithmetic number, because the mean of its divisors is an integer number (212058).

2⁸⁰¹⁰⁹¹ is an apocalyptic number.

801091 is a deficient number, since it is larger than the sum of its proper divisors (47141).

801091 is a wasteful number, since it uses less digits than its factorization.

801091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47140.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 801091 is about 895.0368707489. The cubic root of 801091 is about 92.8739572819.

Adding to 801091 its reverse (190108), we get a palindrome (991199).

The spelling of 801091 in words is "eight hundred one thousand, ninety-one".