1288887 has 8 divisors (see below), whose sum is σ = 1774080. Its totient is φ = 831480.

The previous prime is 1288877. The next prime is 1288891. The reversal of 1288887 is 7888821.

It is a happy number.

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

It is not a de Polignac number, because 1288887 - 2⁴ = 1288871 is a prime.

It is a super-2 number, since 2×1288887² = 3322459397538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6837 + ... + 7022.

It is an arithmetic number, because the mean of its divisors is an integer number (221760).

2^1288887 is an apocalyptic number.

1288887 is a deficient number, since it is larger than the sum of its proper divisors (485193).

1288887 is a wasteful number, since it uses less digits than its factorization.

1288887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13893.

The product of its digits is 57344, while the sum is 42.

The square root of 1288887 is about 1135.2915924995. The cubic root of 1288887 is about 108.8274069058.

The spelling of 1288887 in words is "one million, two hundred eighty-eight thousand, eight hundred eighty-seven".