1256823472 has 20 divisors (see below), whose sum is σ = 2435659336. Its totient is φ = 628266240.

The previous prime is 1256823461. The next prime is 1256823473. The reversal of 1256823472 is 2743286521.

It is not an unprimeable number, because it can be changed into a prime (1256823473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107347 + ... + 118477.

Almost surely, 2^1256823472 is an apocalyptic number.

It is an amenable number.

1256823472 is a deficient number, since it is larger than the sum of its proper divisors (1178835864).

1256823472 is a wasteful number, since it uses less digits than its factorization.

1256823472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18196 (or 18190 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The square root of 1256823472 is about 35451.7061930734. The cubic root of 1256823472 is about 1079.1738858535.

The spelling of 1256823472 in words is "one billion, two hundred fifty-six million, eight hundred twenty-three thousand, four hundred seventy-two".