805481 has 4 divisors (see below), whose sum is σ = 809172. Its totient is φ = 801792.

The previous prime is 805471. The next prime is 805487. The reversal of 805481 is 184508.

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 67600 + 737881 = 260^2 + 859^2 .

It is a cyclic number.

It is not a de Polignac number, because 805481 - 2¹⁴ = 789097 is a prime.

It is a super-2 number, since 2×805481² = 1297599282722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 805481.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 805481.

It is not an unprimeable number, because it can be changed into a prime (805487) 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, 1496 + ... + 1961.

It is an arithmetic number, because the mean of its divisors is an integer number (202293).

2⁸⁰⁵⁴⁸¹ is an apocalyptic number.

It is an amenable number.

805481 is a deficient number, since it is larger than the sum of its proper divisors (3691).

805481 is a wasteful number, since it uses less digits than its factorization.

805481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3690.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 805481 is about 897.4859330374. The cubic root of 805481 is about 93.0432989113.

Adding to 805481 its reverse (184508), we get a palindrome (989989).

The spelling of 805481 in words is "eight hundred five thousand, four hundred eighty-one".