12520523 has 4 divisors (see below), whose sum is σ = 12533808. Its totient is φ = 12507240.

The previous prime is 12520511. The next prime is 12520531. The reversal of 12520523 is 32502521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12520523 - 2⁴ = 12520507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12520495 and 12520504.

It is not an unprimeable number, because it can be changed into a prime (12520553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5111 + ... + 7152.

It is an arithmetic number, because the mean of its divisors is an integer number (3133452).

Almost surely, 2^12520523 is an apocalyptic number.

12520523 is a deficient number, since it is larger than the sum of its proper divisors (13285).

12520523 is a wasteful number, since it uses less digits than its factorization.

12520523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13284.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 12520523 is about 3538.4351060886. The cubic root of 12520523 is about 232.2063846694.

The spelling of 12520523 in words is "twelve million, five hundred twenty thousand, five hundred twenty-three".