1276736256 has 180 divisors, whose sum is σ = 3974002032. Its totient is φ = 406923264.

The previous prime is 1276736249. The next prime is 1276736287. The reversal of 1276736256 is 6526376721.

1276736256 is a `hidden beast` number, since 12 + 7 + 6 + 7 + 3 + 625 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 475590 + ... + 478266.

Almost surely, 2^1276736256 is an apocalyptic number.

1276736256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1276736256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1987001016).

1276736256 is an abundant number, since it is smaller than the sum of its proper divisors (2697265776).

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

1276736256 is an equidigital number, since it uses as much as digits as its factorization.

1276736256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2728 (or 2705 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 1276736256 is about 35731.4463183342. The cubic root of 1276736256 is about 1084.8434315762.

The spelling of 1276736256 in words is "one billion, two hundred seventy-six million, seven hundred thirty-six thousand, two hundred fifty-six".