1296855684 has 30 divisors (see below), whose sum is σ = 3390237774. Its totient is φ = 432285120.

The previous prime is 1296855673. The next prime is 1296855719. The reversal of 1296855684 is 4865586921.

1296855684 is a `hidden beast` number, since 1 + 2 + 9 + 6 + 8 + 556 + 84 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1054430784 + 242424900 = 32472^2 + 15570^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 1296855684.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 2000997 + ... + 2001644.

Almost surely, 2^1296855684 is an apocalyptic number.

It is an amenable number.

1296855684 is an abundant number, since it is smaller than the sum of its proper divisors (2093382090).

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

1296855684 is a wasteful number, since it uses less digits than its factorization.

1296855684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4002657 (or 4002646 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The square root of 1296855684 is about 36011.8825389621. The cubic root of 1296855684 is about 1090.5122536838.

The spelling of 1296855684 in words is "one billion, two hundred ninety-six million, eight hundred fifty-five thousand, six hundred eighty-four".