1284511 has 2 divisors, whose sum is σ = 1284512. Its totient is φ = 1284510.

The previous prime is 1284487. The next prime is 1284523. The reversal of 1284511 is 1154821.

It is a strong prime.

It is an emirp because it is prime and its reverse (1154821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1284511 - 2⁷ = 1284383 is a prime.

1284511 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1284541) 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, 642255 + 642256.

It is an arithmetic number, because the mean of its divisors is an integer number (642256).

2^1284511 is an apocalyptic number.

1284511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284511 is an equidigital number, since it uses as much as digits as its factorization.

1284511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 320, while the sum is 22.

The square root of 1284511 is about 1133.3626956981. The cubic root of 1284511 is about 108.7041044720.

The spelling of 1284511 in words is "one million, two hundred eighty-four thousand, five hundred eleven".