12565603 has 2 divisors, whose sum is σ = 12565604. Its totient is φ = 12565602.

The previous prime is 12565561. The next prime is 12565627. The reversal of 12565603 is 30656521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12565603 is a prime.

It is not a weakly prime, because it can be changed into another prime (12565673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6282801 + 6282802.

It is an arithmetic number, because the mean of its divisors is an integer number (6282802).

Almost surely, 2^12565603 is an apocalyptic number.

12565603 is a deficient number, since it is larger than the sum of its proper divisors (1).

12565603 is an equidigital number, since it uses as much as digits as its factorization.

12565603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 12565603 is about 3544.7994301512. The cubic root of 12565603 is about 232.4847363472.

It can be divided in two parts, 1256 and 5603, that added together give a cube (6859 = 19³).

The spelling of 12565603 in words is "twelve million, five hundred sixty-five thousand, six hundred three".