481221 has 20 divisors (see below), whose sum is σ = 775852. Its totient is φ = 295488.

The previous prime is 481211. The next prime is 481231. The reversal of 481221 is 122184.

It is an interprime number because it is at equal distance from previous prime (481211) and next prime (481231).

It can be written as a sum of positive squares in 2 ways, for example, as 245025 + 236196 = 495^2 + 486^2 .

It is not a de Polignac number, because 481221 - 2⁶ = 481157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 481194 and 481203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (481211) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 825 + ... + 1281.

2⁴⁸¹²²¹ is an apocalyptic number.

It is an amenable number.

481221 is a deficient number, since it is larger than the sum of its proper divisors (294631).

481221 is a wasteful number, since it uses less digits than its factorization.

481221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482 (or 473 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 481221 is about 693.7009442116. The cubic root of 481221 is about 78.3636862403.

It can be divided in two parts, 4 and 81221, that added together give a square (81225 = 285²).

The spelling of 481221 in words is "four hundred eighty-one thousand, two hundred twenty-one".