1284287 has 2 divisors, whose sum is σ = 1284288. Its totient is φ = 1284286.

The previous prime is 1284271. The next prime is 1284293. The reversal of 1284287 is 7824821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1284287 - 2⁴ = 1284271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1284187) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642143 + 642144.

It is an arithmetic number, because the mean of its divisors is an integer number (642144).

2^1284287 is an apocalyptic number.

1284287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284287 is an equidigital number, since it uses as much as digits as its factorization.

1284287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 32.

The square root of 1284287 is about 1133.2638704203. The cubic root of 1284287 is about 108.6977853007.

The spelling of 1284287 in words is "one million, two hundred eighty-four thousand, two hundred eighty-seven".