1284218 has 8 divisors (see below), whose sum is σ = 2074548. Its totient is φ = 592704.

The previous prime is 1284211. The next prime is 1284223. The reversal of 1284218 is 8124821.

It can be written as a sum of positive squares in 2 ways, for example, as 1283689 + 529 = 1133^2 + 23^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 49393 = 1284218 / (1 + 2 + 8 + 4 + 2 + 1 + 8).

It is not an unprimeable number, because it can be changed into a prime (1284211) 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 in 3 ways as a sum of consecutive naturals, for example, 24671 + ... + 24722.

2^1284218 is an apocalyptic number.

1284218 is a deficient number, since it is larger than the sum of its proper divisors (790330).

1284218 is a wasteful number, since it uses less digits than its factorization.

1284218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49408.

The product of its digits is 1024, while the sum is 26.

The square root of 1284218 is about 1133.2334269690. The cubic root of 1284218 is about 108.6958386223.

The spelling of 1284218 in words is "one million, two hundred eighty-four thousand, two hundred eighteen".