1256788474 has 4 divisors (see below), whose sum is σ = 1885182714. Its totient is φ = 628394236.

The previous prime is 1256788447. The next prime is 1256788483. The reversal of 1256788474 is 4748876521.

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

It can be written as a sum of positive squares in only one way, i.e., 1225350025 + 31438449 = 35005^2 + 5607^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314197117 + ... + 314197120.

Almost surely, 2^1256788474 is an apocalyptic number.

1256788474 is a deficient number, since it is larger than the sum of its proper divisors (628394240).

1256788474 is an equidigital number, since it uses as much as digits as its factorization.

1256788474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628394239.

The product of its digits is 3010560, while the sum is 52.

The square root of 1256788474 is about 35451.2125885702. The cubic root of 1256788474 is about 1079.1638687272.

The spelling of 1256788474 in words is "one billion, two hundred fifty-six million, seven hundred eighty-eight thousand, four hundred seventy-four".