1098321 has 8 divisors (see below), whose sum is σ = 1673664. Its totient is φ = 627600.

The previous prime is 1098313. The next prime is 1098341. The reversal of 1098321 is 1238901.

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

It is not a de Polignac number, because 1098321 - 2³ = 1098313 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1098291 and 1098300.

It is not an unprimeable number, because it can be changed into a prime (1098301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26130 + ... + 26171.

It is an arithmetic number, because the mean of its divisors is an integer number (209208).

2^1098321 is an apocalyptic number.

It is an amenable number.

1098321 is a deficient number, since it is larger than the sum of its proper divisors (575343).

1098321 is an equidigital number, since it uses as much as digits as its factorization.

1098321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52311.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1098321 is about 1048.0081106556. The cubic root of 1098321 is about 103.1754636398.

The spelling of 1098321 in words is "one million, ninety-eight thousand, three hundred twenty-one".