321123 has 16 divisors (see below), whose sum is σ = 481536. Its totient is φ = 188640.

The previous prime is 321109. The next prime is 321143.

It is a happy number.

321123 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 321123 - 2⁵ = 321091 is a prime.

It is a super-2 number, since 2×321123² = 206239962258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321099 and 321108.

It is not an unprimeable number, because it can be changed into a prime (321143) 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, 1090 + ... + 1352.

It is an arithmetic number, because the mean of its divisors is an integer number (30096).

2³²¹¹²³ is an apocalyptic number.

321123 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

321123 is a deficient number, since it is larger than the sum of its proper divisors (160413).

321123 is a wasteful number, since it uses less digits than its factorization.

321123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314.

The product of its digits is 36, while the sum is 12.

The square root of 321123 is about 566.6771567656. The cubic root of 321123 is about 68.4789570755.

It can be divided in two parts, 321 and 123, that added together give a palindrome (444).

The spelling of 321123 in words is "three hundred twenty-one thousand, one hundred twenty-three", and thus it is an iban number.