1286011387 has 2 divisors, whose sum is σ = 1286011388. Its totient is φ = 1286011386.

The previous prime is 1286011367. The next prime is 1286011417. The reversal of 1286011387 is 7831106821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1286011387 - 2¹¹ = 1286009339 is a prime.

It is not a weakly prime, because it can be changed into another prime (1286011327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643005693 + 643005694.

It is an arithmetic number, because the mean of its divisors is an integer number (643005694).

Almost surely, 2^1286011387 is an apocalyptic number.

1286011387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286011387 is an equidigital number, since it uses as much as digits as its factorization.

1286011387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 1286011387 is about 35861.0009202197. Note that the first 3 decimals coincide. The cubic root of 1286011387 is about 1087.4641233948.

The spelling of 1286011387 in words is "one billion, two hundred eighty-six million, eleven thousand, three hundred eighty-seven".