1288085 has 8 divisors (see below), whose sum is σ = 1567320. Its totient is φ = 1016064.

The previous prime is 1288061. The next prime is 1288099. The reversal of 1288085 is 5808821.

It can be written as a sum of positive squares in 4 ways, for example, as 17956 + 1270129 = 134^2 + 1127^2 .

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 1288085 - 2⁸ = 1287829 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1400 + ... + 2129.

It is an arithmetic number, because the mean of its divisors is an integer number (195915).

2^1288085 is an apocalyptic number.

It is an amenable number.

1288085 is a deficient number, since it is larger than the sum of its proper divisors (279235).

1288085 is an equidigital number, since it uses as much as digits as its factorization.

1288085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3607.

The product of its (nonzero) digits is 5120, while the sum is 32.

The square root of 1288085 is about 1134.9383243155. The cubic root of 1288085 is about 108.8048298840.

The spelling of 1288085 in words is "one million, two hundred eighty-eight thousand, eighty-five".