12556541 has 4 divisors (see below), whose sum is σ = 12568032. Its totient is φ = 12545052.

The previous prime is 12556529. The next prime is 12556543. The reversal of 12556541 is 14565521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12556541 - 2⁶ = 12556477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12556543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3911 + ... + 6356.

It is an arithmetic number, because the mean of its divisors is an integer number (3142008).

Almost surely, 2^12556541 is an apocalyptic number.

It is an amenable number.

12556541 is a deficient number, since it is larger than the sum of its proper divisors (11491).

12556541 is a wasteful number, since it uses less digits than its factorization.

12556541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11490.

The product of its digits is 6000, while the sum is 29.

The square root of 12556541 is about 3543.5209890729. The cubic root of 12556541 is about 232.4288355059.

The spelling of 12556541 in words is "twelve million, five hundred fifty-six thousand, five hundred forty-one".