811141 has 4 divisors (see below), whose sum is σ = 846432. Its totient is φ = 775852.

The previous prime is 811127. The next prime is 811147. The reversal of 811141 is 141118.

811141 = T₂₅₄ + T₂₅₅ + ... + T₂₇₆.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 811141 - 2¹¹ = 809093 is a prime.

It is an Ulam number.

It is a Duffinian number.

811141 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17611 + ... + 17656.

It is an arithmetic number, because the mean of its divisors is an integer number (211608).

2⁸¹¹¹⁴¹ is an apocalyptic number.

It is an amenable number.

811141 is a deficient number, since it is larger than the sum of its proper divisors (35291).

811141 is a wasteful number, since it uses less digits than its factorization.

811141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35290.

The product of its digits is 32, while the sum is 16.

The square root of 811141 is about 900.6336658154. The cubic root of 811141 is about 93.2607244240.

Adding to 811141 its reverse (141118), we get a palindrome (952259).

The spelling of 811141 in words is "eight hundred eleven thousand, one hundred forty-one".