406685 has 8 divisors (see below), whose sum is σ = 492000. Its totient is φ = 322704.

The previous prime is 406673. The next prime is 406697. The reversal of 406685 is 586604.

It is an interprime number because it is at equal distance from previous prime (406673) and next prime (406697).

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 406685 - 2¹⁸ = 144541 is a prime.

It is a congruent number.

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, 566 + ... + 1064.

It is an arithmetic number, because the mean of its divisors is an integer number (61500).

2⁴⁰⁶⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

406685 is a deficient number, since it is larger than the sum of its proper divisors (85315).

406685 is a wasteful number, since it uses less digits than its factorization.

406685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 406685 is about 637.7185899752. The cubic root of 406685 is about 74.0888268610.

The spelling of 406685 in words is "four hundred six thousand, six hundred eighty-five".