321996 has 12 divisors (see below), whose sum is σ = 751352. Its totient is φ = 107328.

The previous prime is 321991. The next prime is 322001. The reversal of 321996 is 699123.

It is an interprime number because it is at equal distance from previous prime (321991) and next prime (322001).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (321991) 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, 13405 + ... + 13428.

2³²¹⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

321996 is an abundant number, since it is smaller than the sum of its proper divisors (429356).

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

321996 is a wasteful number, since it uses less digits than its factorization.

321996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26840 (or 26838 counting only the distinct ones).

The product of its digits is 2916, while the sum is 30.

The square root of 321996 is about 567.4469138166. The cubic root of 321996 is about 68.5409562025.

The spelling of 321996 in words is "three hundred twenty-one thousand, nine hundred ninety-six".