1281028 has 12 divisors (see below), whose sum is σ = 2562112. Its totient is φ = 549000.

The previous prime is 1280989. The next prime is 1281029. The reversal of 1281028 is 8201821.

1281028 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1281029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22848 + ... + 22903.

2^1281028 is an apocalyptic number.

It is an amenable number.

1281028 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1281028 is a wasteful number, since it uses less digits than its factorization.

1281028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45762 (or 45760 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 1281028 is about 1131.8250748238. The cubic root of 1281028 is about 108.6057637745.

Adding to 1281028 its reverse (8201821), we get a palindrome (9482849).

It can be divided in two parts, 128 and 1028, that added together give a square (1156 = 34²).

The spelling of 1281028 in words is "one million, two hundred eighty-one thousand, twenty-eight".