12555623 has 4 divisors (see below), whose sum is σ = 12563520. Its totient is φ = 12547728.

The previous prime is 12555607. The next prime is 12555629. The reversal of 12555623 is 32655521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 32655521 = 17 ⋅1920913.

It is a cyclic number.

It is not a de Polignac number, because 12555623 - 2⁴ = 12555607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12555629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638 + ... + 5051.

It is an arithmetic number, because the mean of its divisors is an integer number (3140880).

Almost surely, 2^12555623 is an apocalyptic number.

12555623 is a deficient number, since it is larger than the sum of its proper divisors (7897).

12555623 is an equidigital number, since it uses as much as digits as its factorization.

12555623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7896.

The product of its digits is 9000, while the sum is 29.

The square root of 12555623 is about 3543.3914545249. The cubic root of 12555623 is about 232.4231711309.

The spelling of 12555623 in words is "twelve million, five hundred fifty-five thousand, six hundred twenty-three".