1680542 has 8 divisors (see below), whose sum is σ = 2544696. Its totient is φ = 832312.

The previous prime is 1680529. The next prime is 1680551. The reversal of 1680542 is 2450861.

1680542 is nontrivially palindromic in base 8.

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

It is a d-powerful number, because it can be written as 1 + 6⁸ + 8³ + 0 + 5³ + 4⁴ + 2⁵ .

It is a congruent number.

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, 3713 + ... + 4140.

It is an arithmetic number, because the mean of its divisors is an integer number (318087).

2^1680542 is an apocalyptic number.

1680542 is a deficient number, since it is larger than the sum of its proper divisors (864154).

1680542 is a wasteful number, since it uses less digits than its factorization.

1680542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7962.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1680542 is about 1296.3572038601. The cubic root of 1680542 is about 118.8912218303.

It can be divided in two parts, 1680 and 542, that added together give a palindrome (2222).

The spelling of 1680542 in words is "one million, six hundred eighty thousand, five hundred forty-two".