1294841563 has 2 divisors, whose sum is σ = 1294841564. Its totient is φ = 1294841562.

The previous prime is 1294841543. The next prime is 1294841579. The reversal of 1294841563 is 3651484921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1294841563 is a prime.

It is a super-2 number, since 2×1294841563² = 3353229346544565938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1294841543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 647420781 + 647420782.

It is an arithmetic number, because the mean of its divisors is an integer number (647420782).

Almost surely, 2^1294841563 is an apocalyptic number.

1294841563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1294841563 is an equidigital number, since it uses as much as digits as its factorization.

1294841563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 43.

The square root of 1294841563 is about 35983.9070002133. The cubic root of 1294841563 is about 1089.9474101384.

The spelling of 1294841563 in words is "one billion, two hundred ninety-four million, eight hundred forty-one thousand, five hundred sixty-three".