1798321 has 4 divisors (see below), whose sum is σ = 2055232. Its totient is φ = 1541412.

The previous prime is 1798309. The next prime is 1798327. The reversal of 1798321 is 1238971.

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 1798321 - 2⁵ = 1798289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1798327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128445 + ... + 128458.

It is an arithmetic number, because the mean of its divisors is an integer number (513808).

2^1798321 is an apocalyptic number.

It is an amenable number.

1798321 is a deficient number, since it is larger than the sum of its proper divisors (256911).

1798321 is an equidigital number, since it uses as much as digits as its factorization.

1798321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256910.

The product of its digits is 3024, while the sum is 31.

The square root of 1798321 is about 1341.0149141602. The cubic root of 1798321 is about 121.6062058597.

The spelling of 1798321 in words is "one million, seven hundred ninety-eight thousand, three hundred twenty-one".