641589 has 8 divisors (see below), whose sum is σ = 921312. Its totient is φ = 394800.

The previous prime is 641581. The next prime is 641623. The reversal of 641589 is 985146.

641589 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 641589 - 2³ = 641581 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641581) 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, 8187 + ... + 8264.

It is an arithmetic number, because the mean of its divisors is an integer number (115164).

2⁶⁴¹⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

641589 is a deficient number, since it is larger than the sum of its proper divisors (279723).

641589 is a wasteful number, since it uses less digits than its factorization.

641589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16467.

The product of its digits is 8640, while the sum is 33.

The square root of 641589 is about 800.9925093283. The cubic root of 641589 is about 86.2486494222.

It can be divided in two parts, 64 and 1589, that added together give a triangular number (1653 = T₅₇).

The spelling of 641589 in words is "six hundred forty-one thousand, five hundred eighty-nine".