1278310567 has 2 divisors, whose sum is σ = 1278310568. Its totient is φ = 1278310566.

The previous prime is 1278310543. The next prime is 1278310573. The reversal of 1278310567 is 7650138721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1278310567 - 2¹⁵ = 1278277799 is a prime.

It is a super-2 number, since 2×1278310567² = 3268155811407722978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1278310067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639155283 + 639155284.

It is an arithmetic number, because the mean of its divisors is an integer number (639155284).

Almost surely, 2^1278310567 is an apocalyptic number.

1278310567 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278310567 is an equidigital number, since it uses as much as digits as its factorization.

1278310567 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 1278310567 is about 35753.4693001952. The cubic root of 1278310567 is about 1085.2891460398.

The spelling of 1278310567 in words is "one billion, two hundred seventy-eight million, three hundred ten thousand, five hundred sixty-seven".