1281128 has 8 divisors (see below), whose sum is σ = 2402130. Its totient is φ = 640560.

The previous prime is 1281101. The next prime is 1281131. The reversal of 1281128 is 8211821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1085764 + 195364 = 1042^2 + 442^2 .

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80063 + ... + 80078.

2^1281128 is an apocalyptic number.

It is an amenable number.

1281128 is a deficient number, since it is larger than the sum of its proper divisors (1121002).

1281128 is a wasteful number, since it uses less digits than its factorization.

1281128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160147 (or 160143 counting only the distinct ones).

The product of its digits is 256, while the sum is 23.

The square root of 1281128 is about 1131.8692503995. The cubic root of 1281128 is about 108.6085897064.

Adding to 1281128 its reverse (8211821), we get a palindrome (9492949).

The spelling of 1281128 in words is "one million, two hundred eighty-one thousand, one hundred twenty-eight".