1283728 has 10 divisors (see below), whose sum is σ = 2487254. Its totient is φ = 641856.

The previous prime is 1283719. The next prime is 1283731. The reversal of 1283728 is 8273821.

It can be written as a sum of positive squares in only one way, i.e., 1281424 + 2304 = 1132^2 + 48^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1283728.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40101 + ... + 40132.

2^1283728 is an apocalyptic number.

It is an amenable number.

1283728 is a deficient number, since it is larger than the sum of its proper divisors (1203526).

1283728 is an equidigital number, since it uses as much as digits as its factorization.

1283728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80241 (or 80235 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 1283728 is about 1133.0172108137. The cubic root of 1283728 is about 108.6820123777.

The spelling of 1283728 in words is "one million, two hundred eighty-three thousand, seven hundred twenty-eight".