1286716560 has 40 divisors (see below), whose sum is σ = 3988822080. Its totient is φ = 343124352.

The previous prime is 1286716559. The next prime is 1286716589. The reversal of 1286716560 is 656176821.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2680420 + ... + 2680899.

It is an arithmetic number, because the mean of its divisors is an integer number (99720552).

Almost surely, 2^1286716560 is an apocalyptic number.

1286716560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1286716560 is an abundant number, since it is smaller than the sum of its proper divisors (2702105520).

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

1286716560 is a wasteful number, since it uses less digits than its factorization.

1286716560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5361335 (or 5361329 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1286716560 is about 35870.8316045224. The cubic root of 1286716560 is about 1087.6628541949.

The spelling of 1286716560 in words is "one billion, two hundred eighty-six million, seven hundred sixteen thousand, five hundred sixty".