12523403 has 4 divisors (see below), whose sum is σ = 12549000. Its totient is φ = 12497808.

The previous prime is 12523393. The next prime is 12523417. The reversal of 12523403 is 30432521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12523403 - 2¹⁰ = 12522379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12523463) 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, 12050 + ... + 13047.

It is an arithmetic number, because the mean of its divisors is an integer number (3137250).

Almost surely, 2^12523403 is an apocalyptic number.

12523403 is a deficient number, since it is larger than the sum of its proper divisors (25597).

12523403 is an equidigital number, since it uses as much as digits as its factorization.

12523403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25596.

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

The square root of 12523403 is about 3538.8420422505. The cubic root of 12523403 is about 232.2241875232.

Adding to 12523403 its reverse (30432521), we get a palindrome (42955924).

The spelling of 12523403 in words is "twelve million, five hundred twenty-three thousand, four hundred three".