12555636 has 24 divisors (see below), whose sum is σ = 29404704. Its totient is φ = 4169760.

The previous prime is 12555629. The next prime is 12555643. The reversal of 12555636 is 63655521.

It is an interprime number because it is at equal distance from previous prime (12555629) and next prime (12555643).

It is a junction number, because it is equal to n+sod(n) for n = 12555597 and 12555606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1731 + ... + 5301.

It is an arithmetic number, because the mean of its divisors is an integer number (1225196).

Almost surely, 2^12555636 is an apocalyptic number.

It is an amenable number.

12555636 is an abundant number, since it is smaller than the sum of its proper divisors (16849068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12555636 is a wasteful number, since it uses less digits than its factorization.

12555636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3871 (or 3869 counting only the distinct ones).

The product of its digits is 27000, while the sum is 33.

The square root of 12555636 is about 3543.3932889252. The cubic root of 12555636 is about 232.4232513473.

Adding to 12555636 its product of digits (27000), we get a triangular number (12582636 = T₅₀₁₆).

The spelling of 12555636 in words is "twelve million, five hundred fifty-five thousand, six hundred thirty-six".