98021 has 16 divisors (see below), whose sum is σ = 130560. Its totient is φ = 71280.

The previous prime is 98017. The next prime is 98041. The reversal of 98021 is 12089.

98021 = 1² + 2² + ... + 66².

It is not a de Polignac number, because 98021 - 2² = 98017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 97984 and 98002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1430 + ... + 1496.

It is an arithmetic number, because the mean of its divisors is an integer number (8160).

2⁹⁸⁰²¹ is an apocalyptic number.

It is an amenable number.

98021 is a deficient number, since it is larger than the sum of its proper divisors (32539).

98021 is a wasteful number, since it uses less digits than its factorization.

98021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 98021 is about 313.0830560730. The cubic root of 98021 is about 46.1076558542.

It can be divided in two parts, 980 and 21, that added together give a palindrome (1001).

The spelling of 98021 in words is "ninety-eight thousand, twenty-one".