1683642 has 8 divisors (see below), whose sum is σ = 3367296. Its totient is φ = 561212.

The previous prime is 1683637. The next prime is 1683667. The reversal of 1683642 is 2463861.

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

1683642 is an admirable number.

It is a d-powerful number, because it can be written as 1 + 6³ + 8 + 3⁶ + 6⁸ + 4⁵ + 2¹¹ .

It is a plaindrome in base 15.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140298 + ... + 140309.

It is an arithmetic number, because the mean of its divisors is an integer number (420912).

2^1683642 is an apocalyptic number.

1683642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1683642 is a wasteful number, since it uses less digits than its factorization.

1683642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280612.

The product of its digits is 6912, while the sum is 30.

The square root of 1683642 is about 1297.5523110842. The cubic root of 1683642 is about 118.9642808786.

The spelling of 1683642 in words is "one million, six hundred eighty-three thousand, six hundred forty-two".