811241 has 2 divisors, whose sum is σ = 811242. Its totient is φ = 811240.

The previous prime is 811231. The next prime is 811253. The reversal of 811241 is 142118.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 648025 + 163216 = 805^2 + 404^2 .

It is a cyclic number.

It is not a de Polignac number, because 811241 - 2¹⁸ = 549097 is a prime.

It is a super-2 number, since 2×811241² = 1316223920162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (811231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405620 + 405621.

It is an arithmetic number, because the mean of its divisors is an integer number (405621).

2⁸¹¹²⁴¹ is an apocalyptic number.

It is an amenable number.

811241 is a deficient number, since it is larger than the sum of its proper divisors (1).

811241 is an equidigital number, since it uses as much as digits as its factorization.

811241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64, while the sum is 17.

The square root of 811241 is about 900.6891805723. The cubic root of 811241 is about 93.2645567579.

Adding to 811241 its reverse (142118), we get a palindrome (953359).

The spelling of 811241 in words is "eight hundred eleven thousand, two hundred forty-one".