1145728 has 16 divisors (see below), whose sum is σ = 2282760. Its totient is φ = 572800.

The previous prime is 1145723. The next prime is 1145741. The reversal of 1145728 is 8275411.

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 1145696 and 1145705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4348 + ... + 4603.

2^1145728 is an apocalyptic number.

It is an amenable number.

1145728 is a deficient number, since it is larger than the sum of its proper divisors (1137032).

1145728 is an frugal number, since it uses more digits than its factorization.

1145728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8965 (or 8953 counting only the distinct ones).

The product of its digits is 2240, while the sum is 28.

The square root of 1145728 is about 1070.3868459580. The cubic root of 1145728 is about 104.6390630459.

The spelling of 1145728 in words is "one million, one hundred forty-five thousand, seven hundred twenty-eight".