1281184897 has 2 divisors, whose sum is σ = 1281184898. Its totient is φ = 1281184896.

The previous prime is 1281184873. The next prime is 1281184901. The reversal of 1281184897 is 7984811821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1139670081 + 141514816 = 33759^2 + 11896^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1281184897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1281184897.

It is not a weakly prime, because it can be changed into another prime (1281184837) 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, 640592448 + 640592449.

It is an arithmetic number, because the mean of its divisors is an integer number (640592449).

Almost surely, 2^1281184897 is an apocalyptic number.

It is an amenable number.

1281184897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281184897 is an equidigital number, since it uses as much as digits as its factorization.

1281184897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 49.

The square root of 1281184897 is about 35793.6432484876. The cubic root of 1281184897 is about 1086.1019751125.

The spelling of 1281184897 in words is "one billion, two hundred eighty-one million, one hundred eighty-four thousand, eight hundred ninety-seven".