321945 has 24 divisors (see below), whose sum is σ = 562176. Its totient is φ = 157248.

The previous prime is 321911. The next prime is 321947. The reversal of 321945 is 549123.

It is not a de Polignac number, because 321945 - 2⁷ = 321817 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 321945.

It is not an unprimeable number, because it can be changed into a prime (321947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2472 + ... + 2598.

It is an arithmetic number, because the mean of its divisors is an integer number (23424).

2³²¹⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

321945 is a deficient number, since it is larger than the sum of its proper divisors (240231).

321945 is a wasteful number, since it uses less digits than its factorization.

321945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 148 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 321945 is about 567.4019739127. The cubic root of 321945 is about 68.5373373446.

The spelling of 321945 in words is "three hundred twenty-one thousand, nine hundred forty-five".