12520517 has 8 divisors (see below), whose sum is σ = 13309272. Its totient is φ = 11737600.

The previous prime is 12520511. The next prime is 12520531. The reversal of 12520517 is 71502521.

It is a happy number.

12520517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6522916 + 5997601 = 2554^2 + 2449^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12520517 - 2¹⁸ = 12258373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12520492 and 12520501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520511) 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, 3467 + ... + 6087.

It is an arithmetic number, because the mean of its divisors is an integer number (1663659).

Almost surely, 2^12520517 is an apocalyptic number.

12520517 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12520517 is a deficient number, since it is larger than the sum of its proper divisors (788755).

12520517 is a wasteful number, since it uses less digits than its factorization.

12520517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2919.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 12520517 is about 3538.4342582560. The cubic root of 12520517 is about 232.2063475773.

The spelling of 12520517 in words is "twelve million, five hundred twenty thousand, five hundred seventeen".