1282009 has 2 divisors, whose sum is σ = 1282010. Its totient is φ = 1282008.

The previous prime is 1282007. The next prime is 1282031. The reversal of 1282009 is 9002821.

It is an a-pointer prime, because the next prime (1282031) can be obtained adding 1282009 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1265625 + 16384 = 1125^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 1282009 - 2¹ = 1282007 is a prime.

Together with 1282007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1282007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641004 + 641005.

It is an arithmetic number, because the mean of its divisors is an integer number (641005).

2^1282009 is an apocalyptic number.

It is an amenable number.

1282009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1282009 is an equidigital number, since it uses as much as digits as its factorization.

1282009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1282009 is about 1132.2583627424. The cubic root of 1282009 is about 108.6334798144.

The spelling of 1282009 in words is "one million, two hundred eighty-two thousand, nine".