321145 has 8 divisors (see below), whose sum is σ = 420480. Its totient is φ = 233520.

The previous prime is 321143. The next prime is 321163. The reversal of 321145 is 541123.

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

It is not a de Polignac number, because 321145 - 2¹ = 321143 is a prime.

It is a super-2 number, since 2×321145² = 206268222050, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (321143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2865 + ... + 2974.

It is an arithmetic number, because the mean of its divisors is an integer number (52560).

2³²¹¹⁴⁵ is an apocalyptic number.

It is an amenable number.

321145 is a deficient number, since it is larger than the sum of its proper divisors (99335).

321145 is a wasteful number, since it uses less digits than its factorization.

321145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5855.

The product of its digits is 120, while the sum is 16.

The square root of 321145 is about 566.6965678386. The cubic root of 321145 is about 68.4805208612.

Adding to 321145 its reverse (541123), we get a palindrome (862268).

The spelling of 321145 in words is "three hundred twenty-one thousand, one hundred forty-five".