123321 has 16 divisors (see below), whose sum is σ = 186048. Its totient is φ = 72000.

The previous prime is 123311. The next prime is 123323.

It is a happy number.

123321 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 123321 - 2⁵ = 123289 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 123297 and 123306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123323) 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, 1171 + ... + 1271.

It is an arithmetic number, because the mean of its divisors is an integer number (11628).

2¹²³³²¹ is an apocalyptic number.

123321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123321 is a deficient number, since it is larger than the sum of its proper divisors (62727).

123321 is a wasteful number, since it uses less digits than its factorization.

123321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152.

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

The square root of 123321 is about 351.1708985665. The cubic root of 123321 is about 49.7751234604.

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

The spelling of 123321 in words is "one hundred twenty-three thousand, three hundred twenty-one", and thus it is an iban number.