1296457056 has 48 divisors (see below), whose sum is σ = 3781335600. Its totient is φ = 432152064.

The previous prime is 1296457027. The next prime is 1296457061. The reversal of 1296457056 is 6507546921.

1296457056 is a `hidden beast` number, since 1 + 29 + 6 + 4 + 570 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 749401 + ... + 751128.

It is an arithmetic number, because the mean of its divisors is an integer number (78777825).

Almost surely, 2^1296457056 is an apocalyptic number.

1296457056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1296457056 is an abundant number, since it is smaller than the sum of its proper divisors (2484878544).

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

1296457056 is a wasteful number, since it uses less digits than its factorization.

1296457056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500548 (or 1500534 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The square root of 1296457056 is about 36006.3474404167. The cubic root of 1296457056 is about 1090.4005082079.

The spelling of 1296457056 in words is "one billion, two hundred ninety-six million, four hundred fifty-seven thousand, fifty-six".