12406503 has 8 divisors (see below), whose sum is σ = 16672768. Its totient is φ = 8205624.

The previous prime is 12406501. The next prime is 12406517. The reversal of 12406503 is 30560421.

It is a happy number.

12406503 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12406503 - 2¹ = 12406501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12406503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12406501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15901 + ... + 16662.

It is an arithmetic number, because the mean of its divisors is an integer number (2084096).

Almost surely, 2^12406503 is an apocalyptic number.

12406503 is a deficient number, since it is larger than the sum of its proper divisors (4266265).

12406503 is a wasteful number, since it uses less digits than its factorization.

12406503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32693.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 12406503 is about 3522.2866152544. The cubic root of 12406503 is about 231.4993601358.

Adding to 12406503 its reverse (30560421), we get a palindrome (42966924).

The spelling of 12406503 in words is "twelve million, four hundred six thousand, five hundred three".