1284788 has 12 divisors (see below), whose sum is σ = 2309412. Its totient is φ = 624960.

The previous prime is 1284769. The next prime is 1284791. The reversal of 1284788 is 8874821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1106704 + 178084 = 1052^2 + 422^2 .

It is a congruent number.

It is an unprimeable number.

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, 4193 + ... + 4488.

It is an arithmetic number, because the mean of its divisors is an integer number (192451).

2^1284788 is an apocalyptic number.

It is an amenable number.

1284788 is a deficient number, since it is larger than the sum of its proper divisors (1024624).

1284788 is a wasteful number, since it uses less digits than its factorization.

1284788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8722 (or 8720 counting only the distinct ones).

The product of its digits is 28672, while the sum is 38.

The square root of 1284788 is about 1133.4848918270. The cubic root of 1284788 is about 108.7119177884.

The spelling of 1284788 in words is "one million, two hundred eighty-four thousand, seven hundred eighty-eight".