805271 has 2 divisors, whose sum is σ = 805272. Its totient is φ = 805270.

The previous prime is 805267. The next prime is 805279. The reversal of 805271 is 172508.

805271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 805271 - 2² = 805267 is a prime.

It is a super-2 number, since 2×805271² = 1296922766882, which contains 22 as substring.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (805279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402635 + 402636.

It is an arithmetic number, because the mean of its divisors is an integer number (402636).

2⁸⁰⁵²⁷¹ is an apocalyptic number.

805271 is a deficient number, since it is larger than the sum of its proper divisors (1).

805271 is an equidigital number, since it uses as much as digits as its factorization.

805271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 805271 is about 897.3689319338. The cubic root of 805271 is about 93.0352123183.

Adding to 805271 its reverse (172508), we get a palindrome (977779).

The spelling of 805271 in words is "eight hundred five thousand, two hundred seventy-one".