1286319394971 has 64 divisors (see below), whose sum is σ = 2190079180800. Its totient is φ = 739150852608.

The previous prime is 1286319394889. The next prime is 1286319394993. The reversal of 1286319394971 is 1794939136821.

1286319394971 is a `hidden beast` number, since 1 + 2 + 86 + 31 + 9 + 39 + 497 + 1 = 666.

It is not a de Polignac number, because 1286319394971 - 2¹⁴ = 1286319378587 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1286319394899 and 1286319394908.

It is not an unprimeable number, because it can be changed into a prime (1286319393971) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 90901 + ... + 1606518.

It is an arithmetic number, because the mean of its divisors is an integer number (34219987200).

Almost surely, 2^{1286319394971} is an apocalyptic number.

1286319394971 is a deficient number, since it is larger than the sum of its proper divisors (903759785829).

1286319394971 is a wasteful number, since it uses less digits than its factorization.

1286319394971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1697585 (or 1697579 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 63.

The spelling of 1286319394971 in words is "one trillion, two hundred eighty-six billion, three hundred nineteen million, three hundred ninety-four thousand, nine hundred seventy-one".