1256256312 has 32 divisors (see below), whose sum is σ = 3173024400. Its totient is φ = 414434304.

The previous prime is 1256256263. The next prime is 1256256317. The reversal of 1256256312 is 2136526521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256256317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267487 + ... + 272142.

Almost surely, 2^1256256312 is an apocalyptic number.

1256256312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1256256312 is an abundant number, since it is smaller than the sum of its proper divisors (1916768088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1256256312 is a wasteful number, since it uses less digits than its factorization.

1256256312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539735 (or 539731 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 1256256312 is about 35443.7062396133. The cubic root of 1256256312 is about 1079.0115304219.

The spelling of 1256256312 in words is "one billion, two hundred fifty-six million, two hundred fifty-six thousand, three hundred twelve".