1683842 has 4 divisors (see below), whose sum is σ = 2525766. Its totient is φ = 841920.

The previous prime is 1683841. The next prime is 1683887. The reversal of 1683842 is 2483861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1666681 + 17161 = 1291^2 + 131^2 .

It is a d-powerful number, because it can be written as 1 + 6⁸ + 8 + 3⁴ + 8 + 4⁶ + 2⁵ .

It is a junction number, because it is equal to n+sod(n) for n = 1683799 and 1683808.

It is not an unprimeable number, because it can be changed into a prime (1683841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420959 + ... + 420962.

2^1683842 is an apocalyptic number.

1683842 is a deficient number, since it is larger than the sum of its proper divisors (841924).

1683842 is an equidigital number, since it uses as much as digits as its factorization.

1683842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841923.

The product of its digits is 9216, while the sum is 32.

The square root of 1683842 is about 1297.6293769794. The cubic root of 1683842 is about 118.9689912850.

It can be divided in two parts, 1683 and 842, that multiplied together give a triangular number (1417086 = T₁₆₈₃).

The spelling of 1683842 in words is "one million, six hundred eighty-three thousand, eight hundred forty-two".