641706 has 32 divisors (see below), whose sum is σ = 1458240. Its totient is φ = 186624.

The previous prime is 641701. The next prime is 641713. The reversal of 641706 is 607146.

641706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (641701) 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, 1266 + ... + 1698.

It is an arithmetic number, because the mean of its divisors is an integer number (45570).

2⁶⁴¹⁷⁰⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (729120).

641706 is an abundant number, since it is smaller than the sum of its proper divisors (816534).

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

641706 is a wasteful number, since it uses less digits than its factorization.

641706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 641706 is about 801.0655403898. The cubic root of 641706 is about 86.2538918639.

It can be divided in two parts, 64 and 1706, that added together give a triangular number (1770 = T₅₉).

The spelling of 641706 in words is "six hundred forty-one thousand, seven hundred six".