1686242 has 8 divisors (see below), whose sum is σ = 2538432. Its totient is φ = 840100.

The previous prime is 1686239. The next prime is 1686257. The reversal of 1686242 is 2426861.

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

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, 734 + ... + 1977.

It is an arithmetic number, because the mean of its divisors is an integer number (317304).

2^1686242 is an apocalyptic number.

1686242 is a deficient number, since it is larger than the sum of its proper divisors (852190).

1686242 is a wasteful number, since it uses less digits than its factorization.

1686242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024.

The product of its digits is 4608, while the sum is 29.

The square root of 1686242 is about 1298.5538109759. The cubic root of 1686242 is about 119.0254870908.

The spelling of 1686242 in words is "one million, six hundred eighty-six thousand, two hundred forty-two".