1284487 has 2 divisors, whose sum is σ = 1284488. Its totient is φ = 1284486.

The previous prime is 1284473. The next prime is 1284511. The reversal of 1284487 is 7844821.

It is a weak prime.

It is an emirp because it is prime and its reverse (7844821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1284487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1284427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642243 + 642244.

It is an arithmetic number, because the mean of its divisors is an integer number (642244).

2^1284487 is an apocalyptic number.

1284487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284487 is an equidigital number, since it uses as much as digits as its factorization.

1284487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14336, while the sum is 34.

The square root of 1284487 is about 1133.3521076876. The cubic root of 1284487 is about 108.7034274531.

It can be divided in two parts, 1284 and 487, that added together give a palindrome (1771).

The spelling of 1284487 in words is "one million, two hundred eighty-four thousand, four hundred eighty-seven".