641704 has 24 divisors (see below), whose sum is σ = 1400490. Its totient is φ = 274848.

The previous prime is 641701. The next prime is 641713. The reversal of 641704 is 407146.

It can be written as a sum of positive squares in only one way, i.e., 636804 + 4900 = 798^2 + 70^2 .

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 5 ways as a sum of consecutive naturals, for example, 427 + ... + 1210.

2⁶⁴¹⁷⁰⁴ is an apocalyptic number.

It is an amenable number.

641704 is an abundant number, since it is smaller than the sum of its proper divisors (758786).

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

641704 is a wasteful number, since it uses less digits than its factorization.

641704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657 (or 1646 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 641704 is about 801.0642920515. The cubic root of 641704 is about 86.2538022548.

The spelling of 641704 in words is "six hundred forty-one thousand, seven hundred four".