123103205 has 16 divisors (see below), whose sum is σ = 159071040. Its totient is φ = 91114752.

The previous prime is 123103163. The next prime is 123103207. The reversal of 123103205 is 502301321.

It is a cyclic number.

It is not a de Polignac number, because 123103205 - 2¹⁰ = 123102181 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123103207) 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, 7259 + ... + 17288.

It is an arithmetic number, because the mean of its divisors is an integer number (9941940).

Almost surely, 2^123103205 is an apocalyptic number.

It is an amenable number.

123103205 is a deficient number, since it is larger than the sum of its proper divisors (35967835).

123103205 is a wasteful number, since it uses less digits than its factorization.

123103205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24628.

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

The square root of 123103205 is about 11095.1883715420. The cubic root of 123103205 is about 497.4580387662.

Adding to 123103205 its reverse (502301321), we get a palindrome (625404526).

The spelling of 123103205 in words is "one hundred twenty-three million, one hundred three thousand, two hundred five".