120403123 has 4 divisors (see below), whose sum is σ = 120425400. Its totient is φ = 120380848.

The previous prime is 120403117. The next prime is 120403147. The reversal of 120403123 is 321304021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321304021 = 29 ⋅11079449.

It is a cyclic number.

It is not a de Polignac number, because 120403123 - 2¹³ = 120394931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120403097 and 120403106.

It is not an unprimeable number, because it can be changed into a prime (120403103) 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, 2703 + ... + 15751.

It is an arithmetic number, because the mean of its divisors is an integer number (30106350).

Almost surely, 2^120403123 is an apocalyptic number.

120403123 is a deficient number, since it is larger than the sum of its proper divisors (22277).

120403123 is an equidigital number, since it uses as much as digits as its factorization.

120403123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22276.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 120403123 is about 10972.8356863666. The cubic root of 120403123 is about 493.7941235364.

Adding to 120403123 its reverse (321304021), we get a palindrome (441707144).

The spelling of 120403123 in words is "one hundred twenty million, four hundred three thousand, one hundred twenty-three".