12555641 has 4 divisors (see below), whose sum is σ = 14349312. Its totient is φ = 10761972.

The previous prime is 12555629. The next prime is 12555643. The reversal of 12555641 is 14655521.

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 12555641 - 2⁶ = 12555577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12555643) 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, 896825 + ... + 896838.

It is an arithmetic number, because the mean of its divisors is an integer number (3587328).

Almost surely, 2^12555641 is an apocalyptic number.

It is an amenable number.

12555641 is a deficient number, since it is larger than the sum of its proper divisors (1793671).

12555641 is an equidigital number, since it uses as much as digits as its factorization.

12555641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1793670.

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

The square root of 12555641 is about 3543.3939944635. The cubic root of 12555641 is about 232.4232821998.

The spelling of 12555641 in words is "twelve million, five hundred fifty-five thousand, six hundred forty-one".