1268578039 has 2 divisors, whose sum is σ = 1268578040. Its totient is φ = 1268578038.

The previous prime is 1268578009. The next prime is 1268578049. The reversal of 1268578039 is 9308758621.

It is a strong prime.

It is an emirp because it is prime and its reverse (9308758621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1268578039 - 2⁷ = 1268577911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1268577983 and 1268578001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1268578009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634289019 + 634289020.

It is an arithmetic number, because the mean of its divisors is an integer number (634289020).

Almost surely, 2^1268578039 is an apocalyptic number.

1268578039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268578039 is an equidigital number, since it uses as much as digits as its factorization.

1268578039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 1268578039 is about 35617.1031809158. The cubic root of 1268578039 is about 1082.5278120105.

The spelling of 1268578039 in words is "one billion, two hundred sixty-eight million, five hundred seventy-eight thousand, thirty-nine".