481821 has 16 divisors (see below), whose sum is σ = 691200. Its totient is φ = 297648.

The previous prime is 481813. The next prime is 481837. The reversal of 481821 is 128184.

It is not a de Polignac number, because 481821 - 2³ = 481813 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 481791 and 481800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (481801) 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 in 15 ways as a sum of consecutive naturals, for example, 4450 + ... + 4556.

It is an arithmetic number, because the mean of its divisors is an integer number (43200).

2⁴⁸¹⁸²¹ is an apocalyptic number.

It is an amenable number.

481821 is a deficient number, since it is larger than the sum of its proper divisors (209379).

481821 is a wasteful number, since it uses less digits than its factorization.

481821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208.

The product of its digits is 512, while the sum is 24.

The square root of 481821 is about 694.1332725061. The cubic root of 481821 is about 78.3962414032.

The spelling of 481821 in words is "four hundred eighty-one thousand, eight hundred twenty-one".