1288505 has 8 divisors (see below), whose sum is σ = 1579392. Its totient is φ = 1008688.

The previous prime is 1288487. The next prime is 1288513. The reversal of 1288505 is 5058821.

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

It is a cyclic number.

It is not a de Polignac number, because 1288505 - 2⁸ = 1288249 is a prime.

It is a Duffinian number.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 2507 + ... + 2976.

It is an arithmetic number, because the mean of its divisors is an integer number (197424).

2^1288505 is an apocalyptic number.

It is an amenable number.

1288505 is a deficient number, since it is larger than the sum of its proper divisors (290887).

1288505 is an equidigital number, since it uses as much as digits as its factorization.

1288505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5535.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 1288505 is about 1135.1233413158. The cubic root of 1288505 is about 108.8166544304.

The spelling of 1288505 in words is "one million, two hundred eighty-eight thousand, five hundred five".