982021 has 2 divisors, whose sum is σ = 982022. Its totient is φ = 982020.

The previous prime is 981983. The next prime is 982057. The reversal of 982021 is 120289.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 829921 + 152100 = 911^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 982021 - 2¹⁵ = 949253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 981983 and 982001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (982061) 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 as a sum of consecutive naturals, namely, 491010 + 491011.

It is an arithmetic number, because the mean of its divisors is an integer number (491011).

2⁹⁸²⁰²¹ is an apocalyptic number.

It is an amenable number.

982021 is a deficient number, since it is larger than the sum of its proper divisors (1).

982021 is an equidigital number, since it uses as much as digits as its factorization.

982021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 982021 is about 990.9697270855. The cubic root of 982021 is about 99.3970720852.

The spelling of 982021 in words is "nine hundred eighty-two thousand, twenty-one".