1288856 has 16 divisors (see below), whose sum is σ = 2495040. Its totient is φ = 623520.

The previous prime is 1288853. The next prime is 1288871. The reversal of 1288856 is 6588821.

It is a super-3 number, since 3×1288856³ = 6422948616333378048, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2351 + ... + 2846.

It is an arithmetic number, because the mean of its divisors is an integer number (155940).

2^1288856 is an apocalyptic number.

It is an amenable number.

1288856 is a deficient number, since it is larger than the sum of its proper divisors (1206184).

1288856 is a wasteful number, since it uses less digits than its factorization.

1288856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5234 (or 5230 counting only the distinct ones).

The product of its digits is 30720, while the sum is 38.

The square root of 1288856 is about 1135.2779395373. The cubic root of 1288856 is about 108.8265344019.

The spelling of 1288856 in words is "one million, two hundred eighty-eight thousand, eight hundred fifty-six".