1242017563 has 2 divisors, whose sum is σ = 1242017564. Its totient is φ = 1242017562.

The previous prime is 1242017537. The next prime is 1242017599. The reversal of 1242017563 is 3657102421.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242017563 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242017533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621008781 + 621008782.

It is an arithmetic number, because the mean of its divisors is an integer number (621008782).

Almost surely, 2^1242017563 is an apocalyptic number.

1242017563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242017563 is an equidigital number, since it uses as much as digits as its factorization.

1242017563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 1242017563 is about 35242.2695495055. The cubic root of 1242017563 is about 1074.9194280337.

Adding to 1242017563 its reverse (3657102421), we get a palindrome (4899119984).

The spelling of 1242017563 in words is "one billion, two hundred forty-two million, seventeen thousand, five hundred sixty-three".