12515503 has 16 divisors (see below), whose sum is σ = 16805376. Its totient is φ = 9001440.

The previous prime is 12515497. The next prime is 12515507. The reversal of 12515503 is 30551521.

It is not a de Polignac number, because 12515503 - 2²¹ = 10418351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515507) 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, 5251 + ... + 7252.

It is an arithmetic number, because the mean of its divisors is an integer number (1050336).

Almost surely, 2^12515503 is an apocalyptic number.

12515503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12515503 is a deficient number, since it is larger than the sum of its proper divisors (4289873).

12515503 is a wasteful number, since it uses less digits than its factorization.

12515503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12534.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 12515503 is about 3537.7256818470. The cubic root of 12515503 is about 232.1753467787.

It can be divided in two parts, 12 and 515503, that added together give a palindrome (515515).

The spelling of 12515503 in words is "twelve million, five hundred fifteen thousand, five hundred three".