12555863 has 2 divisors, whose sum is σ = 12555864. Its totient is φ = 12555862.

The previous prime is 12555847. The next prime is 12555931. The reversal of 12555863 is 36855521.

It is a weak prime.

It is an emirp because it is prime and its reverse (36855521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12555863 - 2⁴ = 12555847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12555833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6277931 + 6277932.

It is an arithmetic number, because the mean of its divisors is an integer number (6277932).

Almost surely, 2^12555863 is an apocalyptic number.

12555863 is a deficient number, since it is larger than the sum of its proper divisors (1).

12555863 is an equidigital number, since it uses as much as digits as its factorization.

12555863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 35.

The square root of 12555863 is about 3543.4253202234. The cubic root of 12555863 is about 232.4246520399.

The spelling of 12555863 in words is "twelve million, five hundred fifty-five thousand, eight hundred sixty-three".