682221 has 4 divisors (see below), whose sum is σ = 909632. Its totient is φ = 454812.

The previous prime is 682219. The next prime is 682229. The reversal of 682221 is 122286.

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 not a de Polignac number, because 682221 - 2¹ = 682219 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (682229) 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, 113701 + ... + 113706.

It is an arithmetic number, because the mean of its divisors is an integer number (227408).

2⁶⁸²²²¹ is an apocalyptic number.

It is an amenable number.

682221 is a deficient number, since it is larger than the sum of its proper divisors (227411).

682221 is a wasteful number, since it uses less digits than its factorization.

682221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227410.

The product of its digits is 384, while the sum is 21.

The square root of 682221 is about 825.9667063508. The cubic root of 682221 is about 88.0322282094.

It can be divided in two parts, 682 and 221, that added together give a triangular number (903 = T₄₂).

The spelling of 682221 in words is "six hundred eighty-two thousand, two hundred twenty-one".