1286945167 has 2 divisors, whose sum is σ = 1286945168. Its totient is φ = 1286945166.

The previous prime is 1286945159. The next prime is 1286945173. The reversal of 1286945167 is 7615496821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1286945167 - 2³ = 1286945159 is a prime.

It is a super-3 number, since 3×1286945167³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1286945167.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1286945767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643472583 + 643472584.

It is an arithmetic number, because the mean of its divisors is an integer number (643472584).

Almost surely, 2^1286945167 is an apocalyptic number.

1286945167 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286945167 is an equidigital number, since it uses as much as digits as its factorization.

1286945167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 49.

The square root of 1286945167 is about 35874.0179935284. The cubic root of 1286945167 is about 1087.7272642926.

The spelling of 1286945167 in words is "one billion, two hundred eighty-six million, nine hundred forty-five thousand, one hundred sixty-seven".