641595 has 8 divisors (see below), whose sum is σ = 1026576. Its totient is φ = 342176.

The previous prime is 641581. The next prime is 641623. The reversal of 641595 is 595146.

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 641595 - 2⁴ = 641579 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21372 + ... + 21401.

It is an arithmetic number, because the mean of its divisors is an integer number (128322).

2⁶⁴¹⁵⁹⁵ is an apocalyptic number.

641595 is a deficient number, since it is larger than the sum of its proper divisors (384981).

641595 is a wasteful number, since it uses less digits than its factorization.

641595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42781.

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

The square root of 641595 is about 800.9962546729. The cubic root of 641595 is about 86.2489182809.

The spelling of 641595 in words is "six hundred forty-one thousand, five hundred ninety-five".