1685712 has 80 divisors (see below), whose sum is σ = 5178240. Its totient is φ = 462336.

The previous prime is 1685711. The next prime is 1685713. The reversal of 1685712 is 2175861.

It is an interprime number because it is at equal distance from previous prime (1685711) and next prime (1685713).

It is a self number, because there is not a number n which added to its sum of digits gives 1685712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9658 + ... + 9830.

It is an arithmetic number, because the mean of its divisors is an integer number (64728).

2^1685712 is an apocalyptic number.

1685712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1685712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2589120).

1685712 is an abundant number, since it is smaller than the sum of its proper divisors (3492528).

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

1685712 is a wasteful number, since it uses less digits than its factorization.

1685712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 214 counting only the distinct ones).

The product of its digits is 3360, while the sum is 30.

The square root of 1685712 is about 1298.3497217622. The cubic root of 1685712 is about 119.0130155479.

The spelling of 1685712 in words is "one million, six hundred eighty-five thousand, seven hundred twelve".