1245755663 has 2 divisors, whose sum is σ = 1245755664. Its totient is φ = 1245755662.

The previous prime is 1245755629. The next prime is 1245755717. The reversal of 1245755663 is 3665575421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1245755663 - 2²² = 1241561359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1245754663) 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, 622877831 + 622877832.

It is an arithmetic number, because the mean of its divisors is an integer number (622877832).

Almost surely, 2^1245755663 is an apocalyptic number.

1245755663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245755663 is an equidigital number, since it uses as much as digits as its factorization.

1245755663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756000, while the sum is 44.

The square root of 1245755663 is about 35295.2640307450. The cubic root of 1245755663 is about 1075.9967428834.

The spelling of 1245755663 in words is "one billion, two hundred forty-five million, seven hundred fifty-five thousand, six hundred sixty-three".