982721 has 4 divisors (see below), whose sum is σ = 1025472. Its totient is φ = 939972.

The previous prime is 982703. The next prime is 982741. The reversal of 982721 is 127289.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 982721 - 2¹⁰ = 981697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 982721.

It is not an unprimeable number, because it can be changed into a prime (982741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21341 + ... + 21386.

It is an arithmetic number, because the mean of its divisors is an integer number (256368).

2⁹⁸²⁷²¹ is an apocalyptic number.

It is an amenable number.

982721 is a deficient number, since it is larger than the sum of its proper divisors (42751).

982721 is a wasteful number, since it uses less digits than its factorization.

982721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42750.

The product of its digits is 2016, while the sum is 29.

The square root of 982721 is about 991.3228535649. The cubic root of 982721 is about 99.4206837408.

The spelling of 982721 in words is "nine hundred eighty-two thousand, seven hundred twenty-one".