1281067201 has 2 divisors, whose sum is σ = 1281067202. Its totient is φ = 1281067200.

The previous prime is 1281067121. The next prime is 1281067211. The reversal of 1281067201 is 1027601821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1080108225 + 200958976 = 32865^2 + 14176^2 .

It is an emirp because it is prime and its reverse (1027601821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1281067201 is a prime.

It is a super-2 number, since 2×1281067201² = 3282266346955948802, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1281067201.

It is not a weakly prime, because it can be changed into another prime (1281067211) 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, 640533600 + 640533601.

It is an arithmetic number, because the mean of its divisors is an integer number (640533601).

Almost surely, 2^1281067201 is an apocalyptic number.

It is an amenable number.

1281067201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281067201 is an equidigital number, since it uses as much as digits as its factorization.

1281067201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 1281067201 is about 35791.9991199151. Note that the first 3 decimals coincide. The cubic root of 1281067201 is about 1086.0687158556.

The spelling of 1281067201 in words is "one billion, two hundred eighty-one million, sixty-seven thousand, two hundred one".