12403523 has 16 divisors (see below), whose sum is σ = 15085440. Its totient is φ = 10051200.

The previous prime is 12403519. The next prime is 12403529. The reversal of 12403523 is 32530421.

It is a happy number.

12403523 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12403523 - 2² = 12403519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12403495 and 12403504.

It is not an unprimeable number, because it can be changed into a prime (12403529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1808 + ... + 5298.

It is an arithmetic number, because the mean of its divisors is an integer number (942840).

Almost surely, 2^12403523 is an apocalyptic number.

12403523 is a deficient number, since it is larger than the sum of its proper divisors (2681917).

12403523 is a wasteful number, since it uses less digits than its factorization.

12403523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3538.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 12403523 is about 3521.8635691917. The cubic root of 12403523 is about 231.4808235309.

Adding to 12403523 its reverse (32530421), we get a palindrome (44933944).

The spelling of 12403523 in words is "twelve million, four hundred three thousand, five hundred twenty-three".