1296516736 has 32 divisors (see below), whose sum is σ = 2642983200. Its totient is φ = 633179904.

The previous prime is 1296516733. The next prime is 1296516743. The reversal of 1296516736 is 6376156921.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (1296516733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112276 + ... + 123283.

It is an arithmetic number, because the mean of its divisors is an integer number (82593225).

Almost surely, 2^1296516736 is an apocalyptic number.

1296516736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1296516736 is an abundant number, since it is smaller than the sum of its proper divisors (1346466464).

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

1296516736 is an equidigital number, since it uses as much as digits as its factorization.

1296516736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235616 (or 235604 counting only the distinct ones).

The product of its digits is 408240, while the sum is 46.

The square root of 1296516736 is about 36007.1761736463. The cubic root of 1296516736 is about 1090.4172394740.

The spelling of 1296516736 in words is "one billion, two hundred ninety-six million, five hundred sixteen thousand, seven hundred thirty-six".