1288787 has 8 divisors (see below), whose sum is σ = 1394496. Its totient is φ = 1186432.

The previous prime is 1288783. The next prime is 1288799. The reversal of 1288787 is 7878821.

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 1288787 - 2² = 1288783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1288783) by changing a digit.

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, 8 + ... + 1605.

It is an arithmetic number, because the mean of its divisors is an integer number (174312).

2^1288787 is an apocalyptic number.

1288787 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1288787 is a deficient number, since it is larger than the sum of its proper divisors (105709).

1288787 is a wasteful number, since it uses less digits than its factorization.

1288787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677.

The product of its digits is 50176, while the sum is 41.

The square root of 1288787 is about 1135.2475500965. The cubic root of 1288787 is about 108.8245923269.

The spelling of 1288787 in words is "one million, two hundred eighty-eight thousand, seven hundred eighty-seven".