805471 has 2 divisors, whose sum is σ = 805472. Its totient is φ = 805470.

The previous prime is 805463. The next prime is 805487. The reversal of 805471 is 174508.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 805471 - 2³ = 805463 is a prime.

It is a super-3 number, since 3×805471³ = 1567728960526506333, which contains 333 as substring.

805471 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (805421) 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, 402735 + 402736.

It is an arithmetic number, because the mean of its divisors is an integer number (402736).

2⁸⁰⁵⁴⁷¹ is an apocalyptic number.

805471 is a deficient number, since it is larger than the sum of its proper divisors (1).

805471 is an equidigital number, since it uses as much as digits as its factorization.

805471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 805471 is about 897.4803619021. The cubic root of 805471 is about 93.0429138673.

Adding to 805471 its reverse (174508), we get a palindrome (979979).

The spelling of 805471 in words is "eight hundred five thousand, four hundred seventy-one".