1288704 has 40 divisors (see below), whose sum is σ = 3437280. Its totient is φ = 429056.

The previous prime is 1288699. The next prime is 1288709. The reversal of 1288704 is 4078821.

It is an interprime number because it is at equal distance from previous prime (1288699) and next prime (1288709).

It is not an unprimeable number, because it can be changed into a prime (1288709) 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, 1117 + ... + 1955.

It is an arithmetic number, because the mean of its divisors is an integer number (85932).

2^1288704 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 1288704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1718640).

1288704 is an abundant number, since it is smaller than the sum of its proper divisors (2148576).

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

1288704 is an frugal number, since it uses more digits than its factorization.

1288704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 1288704 is about 1135.2109936043. The cubic root of 1288704 is about 108.8222561160.

The spelling of 1288704 in words is "one million, two hundred eighty-eight thousand, seven hundred four".