1281392016 has 40 divisors (see below), whose sum is σ = 3327090624. Its totient is φ = 424959360.

The previous prime is 1281392003. The next prime is 1281392033. The reversal of 1281392016 is 6102931821.

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 7 ways as a sum of consecutive naturals, for example, 58300 + ... + 77211.

Almost surely, 2^1281392016 is an apocalyptic number.

1281392016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1281392016 is an abundant number, since it is smaller than the sum of its proper divisors (2045698608).

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

1281392016 is a wasteful number, since it uses less digits than its factorization.

1281392016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135719 (or 135713 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 1281392016 is about 35796.5363687606. The cubic root of 1281392016 is about 1086.1604991227.

The spelling of 1281392016 in words is "one billion, two hundred eighty-one million, three hundred ninety-two thousand, sixteen".