485821 has 4 divisors (see below), whose sum is σ = 555232. Its totient is φ = 416412.

The previous prime is 485819. The next prime is 485827. The reversal of 485821 is 128584.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 485821 - 2¹ = 485819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 485821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (485827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34695 + ... + 34708.

It is an arithmetic number, because the mean of its divisors is an integer number (138808).

2⁴⁸⁵⁸²¹ is an apocalyptic number.

It is an amenable number.

485821 is a deficient number, since it is larger than the sum of its proper divisors (69411).

485821 is an equidigital number, since it uses as much as digits as its factorization.

485821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69410.

The product of its digits is 2560, while the sum is 28.

The square root of 485821 is about 697.0086082682. The cubic root of 485821 is about 78.6125881161.

The spelling of 485821 in words is "four hundred eighty-five thousand, eight hundred twenty-one".