12403123 has 2 divisors, whose sum is σ = 12403124. Its totient is φ = 12403122.

The previous prime is 12403121. The next prime is 12403147. The reversal of 12403123 is 32130421.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (32130421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12403123 - 2¹ = 12403121 is a prime.

Together with 12403121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12403097 and 12403106.

It is not a weakly prime, because it can be changed into another prime (12403121) 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 as a sum of consecutive naturals, namely, 6201561 + 6201562.

It is an arithmetic number, because the mean of its divisors is an integer number (6201562).

Almost surely, 2^12403123 is an apocalyptic number.

12403123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12403123 is an equidigital number, since it uses as much as digits as its factorization.

12403123 is an odious number, because the sum of its binary digits is odd.

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

The square root of 12403123 is about 3521.8067806170. The cubic root of 12403123 is about 231.4783351700.

Adding to 12403123 its reverse (32130421), we get a palindrome (44533544).

The spelling of 12403123 in words is "twelve million, four hundred three thousand, one hundred twenty-three".