321045 has 16 divisors (see below), whose sum is σ = 544320. Its totient is φ = 161024.

The previous prime is 321037. The next prime is 321047. The reversal of 321045 is 540123.

It is not a de Polignac number, because 321045 - 2³ = 321037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an Ulam 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 321045.

It is not an unprimeable number, because it can be changed into a prime (321047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375 + ... + 884.

It is an arithmetic number, because the mean of its divisors is an integer number (34020).

2³²¹⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

321045 is a deficient number, since it is larger than the sum of its proper divisors (223275).

321045 is a wasteful number, since it uses less digits than its factorization.

321045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 321045 is about 566.6083303306. The cubic root of 321045 is about 68.4734121689.

Adding to 321045 its reverse (540123), we get a palindrome (861168).

The spelling of 321045 in words is "three hundred twenty-one thousand, forty-five".