641559 has 8 divisors (see below), whose sum is σ = 866560. Its totient is φ = 422136.

The previous prime is 641551. The next prime is 641579. The reversal of 641559 is 955146.

641559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 641559 - 2³ = 641551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641551) 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, 1117 + ... + 1590.

It is an arithmetic number, because the mean of its divisors is an integer number (108320).

2⁶⁴¹⁵⁵⁹ is an apocalyptic number.

641559 is a deficient number, since it is larger than the sum of its proper divisors (225001).

641559 is a wasteful number, since it uses less digits than its factorization.

641559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2789.

The product of its digits is 5400, while the sum is 30.

The square root of 641559 is about 800.9737823425. The cubic root of 641559 is about 86.2473051038.

The spelling of 641559 in words is "six hundred forty-one thousand, five hundred fifty-nine".