898021 has 4 divisors (see below), whose sum is σ = 902272. Its totient is φ = 893772.

The previous prime is 898019. The next prime is 898033. The reversal of 898021 is 120898.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120898 = 2 ⋅60449.

It is a cyclic number.

It is not a de Polignac number, because 898021 - 2¹ = 898019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (898091) 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, 1791 + ... + 2236.

It is an arithmetic number, because the mean of its divisors is an integer number (225568).

2⁸⁹⁸⁰²¹ is an apocalyptic number.

It is an amenable number.

898021 is a deficient number, since it is larger than the sum of its proper divisors (4251).

898021 is a wasteful number, since it uses less digits than its factorization.

898021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 898021 is about 947.6396994639. The cubic root of 898021 is about 96.4781197317.

The spelling of 898021 in words is "eight hundred ninety-eight thousand, twenty-one".