1286288 has 20 divisors (see below), whose sum is σ = 2639340. Its totient is φ = 605184.

The previous prime is 1286287. The next prime is 1286303. The reversal of 1286288 is 8826821.

It can be written as a sum of positive squares in 2 ways, for example, as 425104 + 861184 = 652^2 + 928^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1286287) 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, 2093 + ... + 2636.

It is an arithmetic number, because the mean of its divisors is an integer number (131967).

2^1286288 is an apocalyptic number.

It is an amenable number.

1286288 is an abundant number, since it is smaller than the sum of its proper divisors (1353052).

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

1286288 is a wasteful number, since it uses less digits than its factorization.

1286288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4754 (or 4748 counting only the distinct ones).

The product of its digits is 12288, while the sum is 35.

The square root of 1286288 is about 1134.1463750328. The cubic root of 1286288 is about 108.7542086714.

The spelling of 1286288 in words is "one million, two hundred eighty-six thousand, two hundred eighty-eight".