1331728 has 10 divisors (see below), whose sum is σ = 2580254. Its totient is φ = 665856.

The previous prime is 1331719. The next prime is 1331749. The reversal of 1331728 is 8271331.

It can be written as a sum of positive squares in only one way, i.e., 1327104 + 4624 = 1152^2 + 68^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41601 + ... + 41632.

2^1331728 is an apocalyptic number.

It is an amenable number.

1331728 is a deficient number, since it is larger than the sum of its proper divisors (1248526).

1331728 is an equidigital number, since it uses as much as digits as its factorization.

1331728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83241 (or 83235 counting only the distinct ones).

The product of its digits is 1008, while the sum is 25.

The square root of 1331728 is about 1154.0051992950. The cubic root of 1331728 is about 110.0200514411.

The spelling of 1331728 in words is "one million, three hundred thirty-one thousand, seven hundred twenty-eight".