12931523 has 16 divisors (see below), whose sum is σ = 14751072. Its totient is φ = 11232000.

The previous prime is 12931493. The next prime is 12931549. The reversal of 12931523 is 32513921.

It is a cyclic number.

It is not a de Polignac number, because 12931523 - 2⁶ = 12931459 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12931492 and 12931501.

It is not an unprimeable number, because it can be changed into a prime (12931553) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 23633 + ... + 24173.

It is an arithmetic number, because the mean of its divisors is an integer number (921942).

Almost surely, 2^12931523 is an apocalyptic number.

12931523 is a deficient number, since it is larger than the sum of its proper divisors (1819549).

12931523 is a wasteful number, since it uses less digits than its factorization.

12931523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646.

The product of its digits is 1620, while the sum is 26.

The square root of 12931523 is about 3596.0426860648. The cubic root of 12931523 is about 234.7198895813.

The spelling of 12931523 in words is "twelve million, nine hundred thirty-one thousand, five hundred twenty-three".