810201 has 16 divisors (see below), whose sum is σ = 1266048. Its totient is φ = 451200.

The previous prime is 810193. The next prime is 810209. The reversal of 810201 is 102018.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (810193) and next prime (810209).

It is not a de Polignac number, because 810201 - 2³ = 810193 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (810209) 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 15 ways as a sum of consecutive naturals, for example, 391 + ... + 1331.

It is an arithmetic number, because the mean of its divisors is an integer number (79128).

2⁸¹⁰²⁰¹ is an apocalyptic number.

It is an amenable number.

810201 is a deficient number, since it is larger than the sum of its proper divisors (455847).

810201 is a wasteful number, since it uses less digits than its factorization.

810201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 810201 is about 900.1116597401. Note that the first 3 decimals coincide. The cubic root of 810201 is about 93.2246850808.

Adding to 810201 its reverse (102018), we get a palindrome (912219).

The spelling of 810201 in words is "eight hundred ten thousand, two hundred one".