321398 has 16 divisors (see below), whose sum is σ = 601344. Its totient is φ = 125160.

The previous prime is 321397. The next prime is 321403. The reversal of 321398 is 893123.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 321398.

It is not an unprimeable number, because it can be changed into a prime (321397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 890 + ... + 1197.

It is an arithmetic number, because the mean of its divisors is an integer number (37584).

2³²¹³⁹⁸ is an apocalyptic number.

321398 is a deficient number, since it is larger than the sum of its proper divisors (279946).

321398 is a wasteful number, since it uses less digits than its factorization.

321398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107.

The product of its digits is 1296, while the sum is 26.

The square root of 321398 is about 566.9197474070. The cubic root of 321398 is about 68.4984992656.

The spelling of 321398 in words is "three hundred twenty-one thousand, three hundred ninety-eight".