1685642 has 16 divisors (see below), whose sum is σ = 3042240. Its totient is φ = 684288.

The previous prime is 1685627. The next prime is 1685681. The reversal of 1685642 is 2465861.

It is a d-powerful number, because it can be written as 1 + 6³ + 8² + 5⁴ + 6⁸ + 4⁵ + 2¹² .

It is a junction number, because it is equal to n+sod(n) for n = 1685599 and 1685608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2903 + ... + 3434.

It is an arithmetic number, because the mean of its divisors is an integer number (190140).

2^1685642 is an apocalyptic number.

1685642 is a deficient number, since it is larger than the sum of its proper divisors (1356598).

1685642 is a wasteful number, since it uses less digits than its factorization.

1685642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6365.

The product of its digits is 11520, while the sum is 32.

The square root of 1685642 is about 1298.3227641846. The cubic root of 1685642 is about 119.0113681675.

It can be divided in two parts, 16 and 85642, that added together give a palindrome (85658).

The spelling of 1685642 in words is "one million, six hundred eighty-five thousand, six hundred forty-two".