120123 has 10 divisors (see below), whose sum is σ = 179564. Its totient is φ = 80028.

The previous prime is 120121. The next prime is 120157. The reversal of 120123 is 321021.

It is a happy number.

It is not a de Polignac number, because 120123 - 2¹ = 120121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

120123 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (120121) 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 9 ways as a sum of consecutive naturals, for example, 661 + ... + 822.

2¹²⁰¹²³ is an apocalyptic number.

120123 is a deficient number, since it is larger than the sum of its proper divisors (59441).

120123 is an equidigital number, since it uses as much as digits as its factorization.

120123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495 (or 1486 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 120123 is about 346.5876512515. The cubic root of 120123 is about 49.3410881811.

Adding to 120123 its reverse (321021), we get a palindrome (441144).

It can be divided in two parts, 120 and 123, that added together give a 5-th power (243 = 3⁵).

The spelling of 120123 in words is "one hundred twenty thousand, one hundred twenty-three", and thus it is an iban number.