1278601255 has 4 divisors (see below), whose sum is σ = 1534321512. Its totient is φ = 1022881000.

The previous prime is 1278601243. The next prime is 1278601273. The reversal of 1278601255 is 5521068721.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1278601255 - 2⁵ = 1278601223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127860121 + ... + 127860130.

It is an arithmetic number, because the mean of its divisors is an integer number (383580378).

Almost surely, 2^1278601255 is an apocalyptic number.

1278601255 is a deficient number, since it is larger than the sum of its proper divisors (255720257).

1278601255 is an equidigital number, since it uses as much as digits as its factorization.

1278601255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255720256.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 1278601255 is about 35757.5342410519. The cubic root of 1278601255 is about 1085.3714047723.

Adding to 1278601255 its reverse (5521068721), we get a palindrome (6799669976).

The spelling of 1278601255 in words is "one billion, two hundred seventy-eight million, six hundred one thousand, two hundred fifty-five".