821098 has 8 divisors (see below), whose sum is σ = 1235520. Its totient is φ = 409260.

The previous prime is 821089. The next prime is 821099. The reversal of 821098 is 890128.

821098 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (821099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783 + ... + 1501.

It is an arithmetic number, because the mean of its divisors is an integer number (154440).

2⁸²¹⁰⁹⁸ is an apocalyptic number.

821098 is a deficient number, since it is larger than the sum of its proper divisors (414422).

821098 is a wasteful number, since it uses less digits than its factorization.

821098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292.

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

The square root of 821098 is about 906.1445800754. The cubic root of 821098 is about 93.6407747203.

The spelling of 821098 in words is "eight hundred twenty-one thousand, ninety-eight".