1255312678 has 4 divisors (see below), whose sum is σ = 1882969020. Its totient is φ = 627656338.

The previous prime is 1255312673. The next prime is 1255312741. The reversal of 1255312678 is 8762135521.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1255312678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255312673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313828168 + ... + 313828171.

It is an arithmetic number, because the mean of its divisors is an integer number (470742255).

Almost surely, 2^1255312678 is an apocalyptic number.

1255312678 is a deficient number, since it is larger than the sum of its proper divisors (627656342).

1255312678 is an equidigital number, since it uses as much as digits as its factorization.

1255312678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627656341.

The product of its digits is 100800, while the sum is 40.

The square root of 1255312678 is about 35430.3920102502. The cubic root of 1255312678 is about 1078.7412970837.

The spelling of 1255312678 in words is "one billion, two hundred fifty-five million, three hundred twelve thousand, six hundred seventy-eight".