810241 has 4 divisors (see below), whose sum is σ = 818692. Its totient is φ = 801792.

The previous prime is 810239. The next prime is 810253. The reversal of 810241 is 142018.

810241 = 39² + 40² + ... + 135².

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 450241 + 360000 = 671^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 810241 - 2¹ = 810239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (810281) 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, 4080 + ... + 4273.

It is an arithmetic number, because the mean of its divisors is an integer number (204673).

2⁸¹⁰²⁴¹ is an apocalyptic number.

It is an amenable number.

810241 is a deficient number, since it is larger than the sum of its proper divisors (8451).

810241 is an equidigital number, since it uses as much as digits as its factorization.

810241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8450.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 810241 is about 900.1338789314. The cubic root of 810241 is about 93.2262192376.

Adding to 810241 its reverse (142018), we get a palindrome (952259).

The spelling of 810241 in words is "eight hundred ten thousand, two hundred forty-one".