1278148607 has 2 divisors, whose sum is σ = 1278148608. Its totient is φ = 1278148606.

The previous prime is 1278148579. The next prime is 1278148643. The reversal of 1278148607 is 7068418721.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1278148607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1278148657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639074303 + 639074304.

It is an arithmetic number, because the mean of its divisors is an integer number (639074304).

Almost surely, 2^1278148607 is an apocalyptic number.

1278148607 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278148607 is an equidigital number, since it uses as much as digits as its factorization.

1278148607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150528, while the sum is 44.

The square root of 1278148607 is about 35751.2042734227. The cubic root of 1278148607 is about 1085.2433092772.

The spelling of 1278148607 in words is "one billion, two hundred seventy-eight million, one hundred forty-eight thousand, six hundred seven".