1284728 has 8 divisors (see below), whose sum is σ = 2408880. Its totient is φ = 642360.

The previous prime is 1284713. The next prime is 1284737. The reversal of 1284728 is 8274821.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1284694 and 1284703.

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 as a sum of consecutive naturals, namely, 80288 + ... + 80303.

It is an arithmetic number, because the mean of its divisors is an integer number (301110).

2^1284728 is an apocalyptic number.

It is an amenable number.

1284728 is a deficient number, since it is larger than the sum of its proper divisors (1124152).

1284728 is a wasteful number, since it uses less digits than its factorization.

1284728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160597 (or 160593 counting only the distinct ones).

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

The square root of 1284728 is about 1133.4584244691. The cubic root of 1284728 is about 108.7102254686.

The spelling of 1284728 in words is "one million, two hundred eighty-four thousand, seven hundred twenty-eight".