1686142 has 8 divisors (see below), whose sum is σ = 2577096. Its totient is φ = 827112.

The previous prime is 1686137. The next prime is 1686143. The reversal of 1686142 is 2416861.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1686142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1686143) 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, 7848 + ... + 8059.

It is an arithmetic number, because the mean of its divisors is an integer number (322137).

2^1686142 is an apocalyptic number.

1686142 is a deficient number, since it is larger than the sum of its proper divisors (890954).

1686142 is a wasteful number, since it uses less digits than its factorization.

1686142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15962.

The product of its digits is 2304, while the sum is 28.

The square root of 1686142 is about 1298.5153060322. The cubic root of 1686142 is about 119.0231341695.

The spelling of 1686142 in words is "one million, six hundred eighty-six thousand, one hundred forty-two".