1288684 has 6 divisors (see below), whose sum is σ = 2255204. Its totient is φ = 644340.

The previous prime is 1288657. The next prime is 1288691. The reversal of 1288684 is 4868821.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161082 + ... + 161089.

2^1288684 is an apocalyptic number.

It is an amenable number.

1288684 is a deficient number, since it is larger than the sum of its proper divisors (966520).

1288684 is a wasteful number, since it uses less digits than its factorization.

1288684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322175 (or 322173 counting only the distinct ones).

The product of its digits is 24576, while the sum is 37.

The square root of 1288684 is about 1135.2021846350. The cubic root of 1288684 is about 108.8216931585.

The spelling of 1288684 in words is "one million, two hundred eighty-eight thousand, six hundred eighty-four".