1278097 has 2 divisors, whose sum is σ = 1278098. Its totient is φ = 1278096.

The previous prime is 1278047. The next prime is 1278107. The reversal of 1278097 is 7908721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1175056 + 103041 = 1084^2 + 321^2 .

It is an emirp because it is prime and its reverse (7908721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1278097 - 2¹¹ = 1276049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1278007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639048 + 639049.

It is an arithmetic number, because the mean of its divisors is an integer number (639049).

2^1278097 is an apocalyptic number.

It is an amenable number.

1278097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278097 is an equidigital number, since it uses as much as digits as its factorization.

1278097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 1278097 is about 1130.5295219498. The cubic root of 1278097 is about 108.5228703019.

The spelling of 1278097 in words is "one million, two hundred seventy-eight thousand, ninety-seven".