1685842 has 8 divisors (see below), whose sum is σ = 2610432. Its totient is φ = 815700.

The previous prime is 1685837. The next prime is 1685861. The reversal of 1685842 is 2485861.

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

It is a super-4 number, since 4×1685842⁴ (a number of 26 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1685798 and 1685807.

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, 13534 + ... + 13657.

It is an arithmetic number, because the mean of its divisors is an integer number (326304).

2^1685842 is an apocalyptic number.

1685842 is a deficient number, since it is larger than the sum of its proper divisors (924590).

1685842 is a wasteful number, since it uses less digits than its factorization.

1685842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27224.

The product of its digits is 15360, while the sum is 34.

The square root of 1685842 is about 1298.3997843500. The cubic root of 1685842 is about 119.0160748475.

It can be divided in two parts, 16858 and 42, that added together give a square (16900 = 130²).

The spelling of 1685842 in words is "one million, six hundred eighty-five thousand, eight hundred forty-two".