120123403 has 4 divisors (see below), whose sum is σ = 120208320. Its totient is φ = 120038488.

The previous prime is 120123397. The next prime is 120123413. The reversal of 120123403 is 304321021.

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: 304321021 = 151 ⋅2015371.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120123403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120123413) 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, 40300 + ... + 43177.

It is an arithmetic number, because the mean of its divisors is an integer number (30052080).

Almost surely, 2^120123403 is an apocalyptic number.

120123403 is a deficient number, since it is larger than the sum of its proper divisors (84917).

120123403 is an equidigital number, since it uses as much as digits as its factorization.

120123403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84916.

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

The square root of 120123403 is about 10960.0822533410. The cubic root of 120123403 is about 493.4114335913.

Adding to 120123403 its reverse (304321021), we get a palindrome (424444424).

The spelling of 120123403 in words is "one hundred twenty million, one hundred twenty-three thousand, four hundred three".