1288285 has 4 divisors (see below), whose sum is σ = 1545948. Its totient is φ = 1030624.

The previous prime is 1288249. The next prime is 1288291. The reversal of 1288285 is 5828821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5828821 = 23 ⋅253427.

It can be written as a sum of positive squares in 2 ways, for example, as 168921 + 1119364 = 411^2 + 1058^2 .

It is a cyclic number.

It is not a de Polignac number, because 1288285 - 2¹⁷ = 1157213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1288285.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128824 + ... + 128833.

It is an arithmetic number, because the mean of its divisors is an integer number (386487).

2^1288285 is an apocalyptic number.

It is an amenable number.

1288285 is a deficient number, since it is larger than the sum of its proper divisors (257663).

1288285 is an equidigital number, since it uses as much as digits as its factorization.

1288285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257662.

The product of its digits is 10240, while the sum is 34.

The square root of 1288285 is about 1135.0264314103. The cubic root of 1288285 is about 108.8104609409.

The spelling of 1288285 in words is "one million, two hundred eighty-eight thousand, two hundred eighty-five".