641599 has 8 divisors (see below), whose sum is σ = 739328. Its totient is φ = 545400.

The previous prime is 641581. The next prime is 641623. The reversal of 641599 is 995146.

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

It is a cyclic number.

It is not a de Polignac number, because 641599 - 2⁷ = 641471 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 (641519) 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, 754 + ... + 1360.

It is an arithmetic number, because the mean of its divisors is an integer number (92416).

2⁶⁴¹⁵⁹⁹ is an apocalyptic number.

641599 is a deficient number, since it is larger than the sum of its proper divisors (97729).

641599 is a wasteful number, since it uses less digits than its factorization.

641599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765.

The product of its digits is 9720, while the sum is 34.

The square root of 641599 is about 800.9987515596. The cubic root of 641599 is about 86.2490975191.

The spelling of 641599 in words is "six hundred forty-one thousand, five hundred ninety-nine".