1142728 has 8 divisors (see below), whose sum is σ = 2142630. Its totient is φ = 571360.

The previous prime is 1142707. The next prime is 1142737. The reversal of 1142728 is 8272411.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1127844 + 14884 = 1062^2 + 122^2 .

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

It is a plaindrome in base 15.

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, 71413 + ... + 71428.

2^1142728 is an apocalyptic number.

It is an amenable number.

1142728 is a deficient number, since it is larger than the sum of its proper divisors (999902).

1142728 is a wasteful number, since it uses less digits than its factorization.

1142728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142847 (or 142843 counting only the distinct ones).

The product of its digits is 896, while the sum is 25.

The square root of 1142728 is about 1068.9845649026. The cubic root of 1142728 is about 104.5476534566.

The spelling of 1142728 in words is "one million, one hundred forty-two thousand, seven hundred twenty-eight".