1286536065 has 32 divisors (see below), whose sum is σ = 2119779840. Its totient is φ = 665812224.

The previous prime is 1286536063. The next prime is 1286536079. The reversal of 1286536065 is 5606356821.

It is a happy number.

It is not a de Polignac number, because 1286536065 - 2¹ = 1286536063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1286536061) 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 in 31 ways as a sum of consecutive naturals, for example, 217416 + ... + 223254.

It is an arithmetic number, because the mean of its divisors is an integer number (66243120).

Almost surely, 2^1286536065 is an apocalyptic number.

1286536065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1286536065 is a deficient number, since it is larger than the sum of its proper divisors (833243775).

1286536065 is a wasteful number, since it uses less digits than its factorization.

1286536065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6281.

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 1286536065 is about 35868.3156142019. The cubic root of 1286536065 is about 1087.6119942793.

The spelling of 1286536065 in words is "one billion, two hundred eighty-six million, five hundred thirty-six thousand, sixty-five".