1278552097 has 2 divisors, whose sum is σ = 1278552098. Its totient is φ = 1278552096.

The previous prime is 1278552091. The next prime is 1278552101. The reversal of 1278552097 is 7902558721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 730945296 + 547606801 = 27036^2 + 23401^2 .

It is a cyclic number.

It is not a de Polignac number, because 1278552097 - 2⁷ = 1278551969 is a prime.

It is not a weakly prime, because it can be changed into another prime (1278552091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639276048 + 639276049.

It is an arithmetic number, because the mean of its divisors is an integer number (639276049).

Almost surely, 2^1278552097 is an apocalyptic number.

It is an amenable number.

1278552097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278552097 is an equidigital number, since it uses as much as digits as its factorization.

1278552097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 352800, while the sum is 46.

The square root of 1278552097 is about 35756.8468548333. The cubic root of 1278552097 is about 1085.3574949441.

The spelling of 1278552097 in words is "one billion, two hundred seventy-eight million, five hundred fifty-two thousand, ninety-seven".