1685671 has 8 divisors (see below), whose sum is σ = 1831424. Its totient is φ = 1542240.

The previous prime is 1685627. The next prime is 1685681. The reversal of 1685671 is 1765861.

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

It is a cyclic number.

It is not a de Polignac number, because 1685671 - 2⁷ = 1685543 is a prime.

It is a Duffinian number.

1685671 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1141 + ... + 2161.

It is an arithmetic number, because the mean of its divisors is an integer number (228928).

2^1685671 is an apocalyptic number.

1685671 is a deficient number, since it is larger than the sum of its proper divisors (145753).

1685671 is a wasteful number, since it uses less digits than its factorization.

1685671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161.

The product of its digits is 10080, while the sum is 34.

The square root of 1685671 is about 1298.3339323918. Note that the first 3 decimals coincide. The cubic root of 1685671 is about 119.0120506592.

The spelling of 1685671 in words is "one million, six hundred eighty-five thousand, six hundred seventy-one".