321481 has 4 divisors (see below), whose sum is σ = 329364. Its totient is φ = 313600.

The previous prime is 321469. The next prime is 321509. The reversal of 321481 is 184123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 184123 = 101 ⋅1823.

It can be written as a sum of positive squares in 2 ways, for example, as 55225 + 266256 = 235^2 + 516^2 .

It is a cyclic number.

It is not a de Polignac number, because 321481 - 2⁵ = 321449 is a prime.

It is a super-2 number, since 2×321481² = 206700066722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328481) 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 3 ways as a sum of consecutive naturals, for example, 3880 + ... + 3961.

It is an arithmetic number, because the mean of its divisors is an integer number (82341).

2³²¹⁴⁸¹ is an apocalyptic number.

It is an amenable number.

321481 is a deficient number, since it is larger than the sum of its proper divisors (7883).

321481 is an equidigital number, since it uses as much as digits as its factorization.

321481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7882.

The product of its digits is 192, while the sum is 19.

The square root of 321481 is about 566.9929452824. The cubic root of 321481 is about 68.5043952638.

The spelling of 321481 in words is "three hundred twenty-one thousand, four hundred eighty-one".