1288885 has 16 divisors (see below), whose sum is σ = 1693440. Its totient is φ = 936000.

The previous prime is 1288877. The next prime is 1288891. The reversal of 1288885 is 5888821.

It is not a de Polignac number, because 1288885 - 2³ = 1288877 is a prime.

It is a super-2 number, since 2×1288885² = 3322449086450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5010 + ... + 5260.

It is an arithmetic number, because the mean of its divisors is an integer number (105840).

2^1288885 is an apocalyptic number.

It is an amenable number.

1288885 is a deficient number, since it is larger than the sum of its proper divisors (404555).

1288885 is a wasteful number, since it uses less digits than its factorization.

1288885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348.

The product of its digits is 40960, while the sum is 40.

The square root of 1288885 is about 1135.2907116682. The cubic root of 1288885 is about 108.8273506156.

The spelling of 1288885 in words is "one million, two hundred eighty-eight thousand, eight hundred eighty-five".