1242634663 has 2 divisors, whose sum is σ = 1242634664. Its totient is φ = 1242634662.

The previous prime is 1242634609. The next prime is 1242634697. The reversal of 1242634663 is 3664362421.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3664362421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242634663 - 2²¹ = 1240537511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242634963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621317331 + 621317332.

It is an arithmetic number, because the mean of its divisors is an integer number (621317332).

Almost surely, 2^1242634663 is an apocalyptic number.

1242634663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242634663 is an equidigital number, since it uses as much as digits as its factorization.

1242634663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 37.

The square root of 1242634663 is about 35251.0235737914. The cubic root of 1242634663 is about 1075.0974241613.

It can be divided in two parts, 12426 and 34663, that added together give a square (47089 = 217²).

The spelling of 1242634663 in words is "one billion, two hundred forty-two million, six hundred thirty-four thousand, six hundred sixty-three".