659406 has 32 divisors (see below), whose sum is σ = 1467648. Its totient is φ = 195840.

The previous prime is 659371. The next prime is 659419. The reversal of 659406 is 604956.

It is a congruent number.

It is an unprimeable number.

659406 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 15 ways as a sum of consecutive naturals, for example, 6351 + ... + 6453.

It is an arithmetic number, because the mean of its divisors is an integer number (45864).

2⁶⁵⁹⁴⁰⁶ is an apocalyptic number.

659406 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 659406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (733824).

659406 is an abundant number, since it is smaller than the sum of its proper divisors (808242).

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

659406 is a wasteful number, since it uses less digits than its factorization.

659406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 659406 is about 812.0381764425. The cubic root of 659406 is about 87.0397493088.

The spelling of 659406 in words is "six hundred fifty-nine thousand, four hundred six".