1281088 has 28 divisors (see below), whose sum is σ = 2615692. Its totient is φ = 622080.

The previous prime is 1281083. The next prime is 1281089. The reversal of 1281088 is 8801821.

It can be written as a sum of positive squares in 2 ways, for example, as 861184 + 419904 = 928^2 + 648^2 .

It is not an unprimeable number, because it can be changed into a prime (1281083) 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, 2098 + ... + 2638.

2^1281088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1281088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1307846).

1281088 is an abundant number, since it is smaller than the sum of its proper divisors (1334604).

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

1281088 is an equidigital number, since it uses as much as digits as its factorization.

1281088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590 (or 580 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 1281088 is about 1131.8515803762. The cubic root of 1281088 is about 108.6074593513.

The spelling of 1281088 in words is "one million, two hundred eighty-one thousand, eighty-eight".