12917525 has 6 divisors (see below), whose sum is σ = 16017762. Its totient is φ = 10334000.

The previous prime is 12917507. The next prime is 12917563. The reversal of 12917525 is 52571921.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3418801 + 9498724 = 1849^2 + 3082^2 .

It is not a de Polignac number, because 12917525 - 2⁶ = 12917461 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12917491 and 12917500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 258326 + ... + 258375.

It is an arithmetic number, because the mean of its divisors is an integer number (2669627).

Almost surely, 2^12917525 is an apocalyptic number.

It is an amenable number.

12917525 is a deficient number, since it is larger than the sum of its proper divisors (3100237).

12917525 is an equidigital number, since it uses as much as digits as its factorization.

12917525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516711 (or 516706 counting only the distinct ones).

The product of its digits is 6300, while the sum is 32.

The square root of 12917525 is about 3594.0958529232. The cubic root of 12917525 is about 234.6351665043.

The spelling of 12917525 in words is "twelve million, nine hundred seventeen thousand, five hundred twenty-five".