1686056 has 16 divisors (see below), whose sum is σ = 3175200. Its totient is φ = 839344.

The previous prime is 1686049. The next prime is 1686067. The reversal of 1686056 is 6506861.

It is a plaindrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3101 + ... + 3603.

It is an arithmetic number, because the mean of its divisors is an integer number (198450).

2^1686056 is an apocalyptic number.

It is an amenable number.

1686056 is a deficient number, since it is larger than the sum of its proper divisors (1489144).

1686056 is a wasteful number, since it uses less digits than its factorization.

1686056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928 (or 924 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1686056 is about 1298.4821908675. The cubic root of 1686056 is about 119.0211105828.

The spelling of 1686056 in words is "one million, six hundred eighty-six thousand, fifty-six".