123320 has 16 divisors (see below), whose sum is σ = 277560. Its totient is φ = 49312.

The previous prime is 123311. The next prime is 123323. The reversal of 123320 is 23321.

123320 is nontrivially palindromic in base 6.

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 3 ways as a sum of consecutive naturals, for example, 1502 + ... + 1581.

2¹²³³²⁰ is an apocalyptic number.

123320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123320 is an abundant number, since it is smaller than the sum of its proper divisors (154240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123320 is a wasteful number, since it uses less digits than its factorization.

123320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3094 (or 3090 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 123320 is about 351.1694747554. The cubic root of 123320 is about 49.7749889192.

Adding to 123320 its reverse (23321), we get a palindrome (146641).

Subtracting from 123320 its reverse (23321), we obtain a palindrome (99999).

The spelling of 123320 in words is "one hundred twenty-three thousand, three hundred twenty", and thus it is an iban number.