321406 has 8 divisors (see below), whose sum is σ = 484704. Its totient is φ = 159840.

The previous prime is 321403. The next prime is 321413. The reversal of 321406 is 604123.

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

It is a self number, because there is not a number n which added to its sum of digits gives 321406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321403) 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, 246 + ... + 838.

It is an arithmetic number, because the mean of its divisors is an integer number (60588).

2³²¹⁴⁰⁶ is an apocalyptic number.

321406 is a deficient number, since it is larger than the sum of its proper divisors (163298).

321406 is a wasteful number, since it uses less digits than its factorization.

321406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 321406 is about 566.9268030355. The cubic root of 321406 is about 68.4990675988.

Adding to 321406 its reverse (604123), we get a palindrome (925529).

It can be divided in two parts, 321 and 406, that added together give a palindrome (727).

The spelling of 321406 in words is "three hundred twenty-one thousand, four hundred six".