1281707968 has 28 divisors (see below), whose sum is σ = 2550078720. Its totient is φ = 639168512.

The previous prime is 1281707963. The next prime is 1281707971. The reversal of 1281707968 is 8697071821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281707963) 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, 1633 + ... + 50656.

It is an arithmetic number, because the mean of its divisors is an integer number (91074240).

Almost surely, 2^1281707968 is an apocalyptic number.

It is an amenable number.

1281707968 is a deficient number, since it is larger than the sum of its proper divisors (1268370752).

1281707968 is an equidigital number, since it uses as much as digits as its factorization.

1281707968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52684 (or 52674 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 49.

The square root of 1281707968 is about 35800.9492611579. The cubic root of 1281707968 is about 1086.2497630836.

The spelling of 1281707968 in words is "one billion, two hundred eighty-one million, seven hundred seven thousand, nine hundred sixty-eight".