1260845563 has 2 divisors, whose sum is σ = 1260845564. Its totient is φ = 1260845562.

The previous prime is 1260845549. The next prime is 1260845569. The reversal of 1260845563 is 3655480621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1260845563 is a prime.

It is not a weakly prime, because it can be changed into another prime (1260845569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630422781 + 630422782.

It is an arithmetic number, because the mean of its divisors is an integer number (630422782).

Almost surely, 2^1260845563 is an apocalyptic number.

1260845563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260845563 is an equidigital number, since it uses as much as digits as its factorization.

1260845563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 1260845563 is about 35508.3872204864. The cubic root of 1260845563 is about 1080.3238520674.

The spelling of 1260845563 in words is "one billion, two hundred sixty million, eight hundred forty-five thousand, five hundred sixty-three".