12517903 has 4 divisors (see below), whose sum is σ = 13176760. Its totient is φ = 11859048.

The previous prime is 12517889. The next prime is 12517909. The reversal of 12517903 is 30971521.

12517903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30971521 = 7 ⋅4424503.

It is a cyclic number.

It is not a de Polignac number, because 12517903 - 2⁹ = 12517391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12517909) 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, 329400 + ... + 329437.

It is an arithmetic number, because the mean of its divisors is an integer number (3294190).

Almost surely, 2^12517903 is an apocalyptic number.

12517903 is a deficient number, since it is larger than the sum of its proper divisors (658857).

12517903 is an equidigital number, since it uses as much as digits as its factorization.

12517903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658856.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 12517903 is about 3538.0648665619. The cubic root of 12517903 is about 232.1901866462.

The spelling of 12517903 in words is "twelve million, five hundred seventeen thousand, nine hundred three".