240123 has 16 divisors (see below), whose sum is σ = 354816. Its totient is φ = 143520.

The previous prime is 240113. The next prime is 240131. The reversal of 240123 is 321042.

It is not a de Polignac number, because 240123 - 2⁶ = 240059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 240099 and 240108.

It is not an unprimeable number, because it can be changed into a prime (240113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1768 + ... + 1898.

It is an arithmetic number, because the mean of its divisors is an integer number (22176).

2²⁴⁰¹²³ is an apocalyptic number.

240123 is a deficient number, since it is larger than the sum of its proper divisors (114693).

240123 is a wasteful number, since it uses less digits than its factorization.

240123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 240123 is about 490.0234688257. The cubic root of 240123 is about 62.1552646837.

Adding to 240123 its reverse (321042), we get a palindrome (561165).

It can be divided in two parts, 240 and 123, that added together give a palindrome (363).

The spelling of 240123 in words is "two hundred forty thousand, one hundred twenty-three", and thus it is an iban number.