1288105 has 32 divisors (see below), whose sum is σ = 2016000. Its totient is φ = 767232.

The previous prime is 1288103. The next prime is 1288109. The reversal of 1288105 is 5018821.

It is a cyclic number.

It is not a de Polignac number, because 1288105 - 2¹ = 1288103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1288105.

It is not an unprimeable number, because it can be changed into a prime (1288103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8571 + ... + 8719.

It is an arithmetic number, because the mean of its divisors is an integer number (63000).

2^1288105 is an apocalyptic number.

It is an amenable number.

1288105 is a deficient number, since it is larger than the sum of its proper divisors (727895).

1288105 is a wasteful number, since it uses less digits than its factorization.

1288105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 1288105 is about 1134.9471353327. The cubic root of 1288105 is about 108.8053930159.

The spelling of 1288105 in words is "one million, two hundred eighty-eight thousand, one hundred five".