120503123 has 16 divisors (see below), whose sum is σ = 137985120. Its totient is φ = 104249856.

The previous prime is 120503093. The next prime is 120503147. The reversal of 120503123 is 321305021.

It is a cyclic number.

It is not a de Polignac number, because 120503123 - 2¹⁰ = 120502099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (120503153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58436 + ... + 60462.

It is an arithmetic number, because the mean of its divisors is an integer number (8624070).

Almost surely, 2^120503123 is an apocalyptic number.

120503123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

120503123 is a deficient number, since it is larger than the sum of its proper divisors (17481997).

120503123 is a wasteful number, since it uses less digits than its factorization.

120503123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 120503123 is about 10977.3914478805. The cubic root of 120503123 is about 493.9307914977.

Adding to 120503123 its reverse (321305021), we get a palindrome (441808144).

It can be divided in two parts, 12050 and 3123, that multiplied together give a triangular number (37632150 = T₈₆₇₅).

The spelling of 120503123 in words is "one hundred twenty million, five hundred three thousand, one hundred twenty-three".