1288735 has 8 divisors (see below), whose sum is σ = 1767456. Its totient is φ = 883680.

The previous prime is 1288733. The next prime is 1288769. The reversal of 1288735 is 5378821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1288735 - 2¹ = 1288733 is a prime.

It is a Duffinian number.

1288735 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1288735.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18376 + ... + 18445.

It is an arithmetic number, because the mean of its divisors is an integer number (220932).

2^1288735 is an apocalyptic number.

1288735 is a deficient number, since it is larger than the sum of its proper divisors (478721).

1288735 is an equidigital number, since it uses as much as digits as its factorization.

1288735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36833.

The product of its digits is 13440, while the sum is 34.

The square root of 1288735 is about 1135.2246473716. The cubic root of 1288735 is about 108.8231286884.

The spelling of 1288735 in words is "one million, two hundred eighty-eight thousand, seven hundred thirty-five".