321744 has 20 divisors (see below), whose sum is σ = 831296. Its totient is φ = 107232.

The previous prime is 321743. The next prime is 321751. The reversal of 321744 is 447123.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 321744.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321743) 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, 3304 + ... + 3399.

2³²¹⁷⁴⁴ is an apocalyptic number.

It is an amenable number.

321744 is an abundant number, since it is smaller than the sum of its proper divisors (509552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321744 is a wasteful number, since it uses less digits than its factorization.

321744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6714 (or 6708 counting only the distinct ones).

The product of its digits is 672, while the sum is 21.

The square root of 321744 is about 567.2248231522. The cubic root of 321744 is about 68.5230710644.

Adding to 321744 its reverse (447123), we get a palindrome (768867).

The spelling of 321744 in words is "three hundred twenty-one thousand, seven hundred forty-four", and thus it is an iban number.