1294784256 has 36 divisors (see below), whose sum is σ = 3446016392. Its totient is φ = 431594496.

The previous prime is 1294784251. The next prime is 1294784291. The reversal of 1294784256 is 6524874921.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1294784251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 842191 + ... + 843726.

Almost surely, 2^1294784256 is an apocalyptic number.

1294784256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1294784256 is an abundant number, since it is smaller than the sum of its proper divisors (2151232136).

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

1294784256 is an equidigital number, since it uses as much as digits as its factorization.

1294784256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685936 (or 1685922 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 1294784256 is about 35983.1107048849. The cubic root of 1294784256 is about 1089.9313302978.

The spelling of 1294784256 in words is "one billion, two hundred ninety-four million, seven hundred eighty-four thousand, two hundred fifty-six".