12513603 has 4 divisors (see below), whose sum is σ = 16684808. Its totient is φ = 8342400.

The previous prime is 12513593. The next prime is 12513607. The reversal of 12513603 is 30631521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30631521 = 3 ⋅10210507.

It is not a de Polignac number, because 12513603 - 2¹⁰ = 12512579 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 12513603.

It is not an unprimeable number, because it can be changed into a prime (12513607) 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, 2085598 + ... + 2085603.

It is an arithmetic number, because the mean of its divisors is an integer number (4171202).

Almost surely, 2^12513603 is an apocalyptic number.

12513603 is a deficient number, since it is larger than the sum of its proper divisors (4171205).

12513603 is an equidigital number, since it uses as much as digits as its factorization.

12513603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4171204.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 12513603 is about 3537.4571375495. The cubic root of 12513603 is about 232.1635972048.

The spelling of 12513603 in words is "twelve million, five hundred thirteen thousand, six hundred three".