12555523 has 4 divisors (see below), whose sum is σ = 13216360. Its totient is φ = 11894688.

The previous prime is 12555511. The next prime is 12555547. The reversal of 12555523 is 32555521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12555523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12555491 and 12555500.

It is not an unprimeable number, because it can be changed into a prime (12555593) 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, 330390 + ... + 330427.

It is an arithmetic number, because the mean of its divisors is an integer number (3304090).

Almost surely, 2^12555523 is an apocalyptic number.

12555523 is a deficient number, since it is larger than the sum of its proper divisors (660837).

12555523 is an equidigital number, since it uses as much as digits as its factorization.

12555523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660836.

The product of its digits is 7500, while the sum is 28.

The square root of 12555523 is about 3543.3773437217. The cubic root of 12555523 is about 232.4225540799.

The spelling of 12555523 in words is "twelve million, five hundred fifty-five thousand, five hundred twenty-three".