1282945663 has 4 divisors (see below), whose sum is σ = 1289662848. Its totient is φ = 1276228480.

The previous prime is 1282945639. The next prime is 1282945667. The reversal of 1282945663 is 3665492821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1282945663 - 2²⁹ = 746074751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1282945667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3358306 + ... + 3358687.

It is an arithmetic number, because the mean of its divisors is an integer number (322415712).

Almost surely, 2^1282945663 is an apocalyptic number.

1282945663 is a deficient number, since it is larger than the sum of its proper divisors (6717185).

1282945663 is an equidigital number, since it uses as much as digits as its factorization.

1282945663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6717184.

The product of its digits is 622080, while the sum is 46.

The square root of 1282945663 is about 35818.2308747934. The cubic root of 1282945663 is about 1086.5993001613.

The spelling of 1282945663 in words is "one billion, two hundred eighty-two million, nine hundred forty-five thousand, six hundred sixty-three".