1282505641 has 2 divisors, whose sum is σ = 1282505642. Its totient is φ = 1282505640.

The previous prime is 1282505629. The next prime is 1282505717. The reversal of 1282505641 is 1465052821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1276275625 + 6230016 = 35725^2 + 2496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1282505641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1282505597 and 1282505606.

It is not a weakly prime, because it can be changed into another prime (1282505621) 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 as a sum of consecutive naturals, namely, 641252820 + 641252821.

It is an arithmetic number, because the mean of its divisors is an integer number (641252821).

Almost surely, 2^1282505641 is an apocalyptic number.

It is an amenable number.

1282505641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1282505641 is an equidigital number, since it uses as much as digits as its factorization.

1282505641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 1282505641 is about 35812.0879173499. The cubic root of 1282505641 is about 1086.4750594436.

The spelling of 1282505641 in words is "one billion, two hundred eighty-two million, five hundred five thousand, six hundred forty-one".