1296274320 has 320 divisors, whose sum is σ = 4933612800. Its totient is φ = 310210560.

The previous prime is 1296274303. The next prime is 1296274321. The reversal of 1296274320 is 234726921.

1296274320 is a `hidden beast` number, since 1 + 2 + 9 + 627 + 4 + 3 + 20 = 666.

It is a super-2 number, since 2×1296274320² = 3360654225382924800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1296274321) 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 63 ways as a sum of consecutive naturals, for example, 2114334 + ... + 2114946.

It is an arithmetic number, because the mean of its divisors is an integer number (15417540).

Almost surely, 2^1296274320 is an apocalyptic number.

1296274320 is a gapful number since it is divisible by the number (10) 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 1296274320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2466806400).

1296274320 is an abundant number, since it is smaller than the sum of its proper divisors (3637338480).

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

1296274320 is a wasteful number, since it uses less digits than its factorization.

1296274320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735 (or 723 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 1296274320 is about 36003.8097984088. The cubic root of 1296274320 is about 1090.3492750442.

The spelling of 1296274320 in words is "one billion, two hundred ninety-six million, two hundred seventy-four thousand, three hundred twenty".