816271 has 2 divisors, whose sum is σ = 816272. Its totient is φ = 816270.

The previous prime is 816251. The next prime is 816317. The reversal of 816271 is 172618.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 816271 - 2⁵ = 816239 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816251) 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 as a sum of consecutive naturals, namely, 408135 + 408136.

It is an arithmetic number, because the mean of its divisors is an integer number (408136).

2⁸¹⁶²⁷¹ is an apocalyptic number.

816271 is a deficient number, since it is larger than the sum of its proper divisors (1).

816271 is an equidigital number, since it uses as much as digits as its factorization.

816271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 25.

The square root of 816271 is about 903.4771718201. The cubic root of 816271 is about 93.4569182022.

Adding to 816271 its reverse (172618), we get a palindrome (988889).

The spelling of 816271 in words is "eight hundred sixteen thousand, two hundred seventy-one".