195641 has 4 divisors (see below), whose sum is σ = 201984. Its totient is φ = 189300.

The previous prime is 195599. The next prime is 195659. The reversal of 195641 is 146591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146591 = 17 ⋅8623.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 195641.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195691) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3125 + ... + 3186.

It is an arithmetic number, because the mean of its divisors is an integer number (50496).

2¹⁹⁵⁶⁴¹ is an apocalyptic number.

It is an amenable number.

195641 is a deficient number, since it is larger than the sum of its proper divisors (6343).

195641 is an equidigital number, since it uses as much as digits as its factorization.

195641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6342.

The product of its digits is 1080, while the sum is 26.

The square root of 195641 is about 442.3132374234. The cubic root of 195641 is about 58.0523704551.

The spelling of 195641 in words is "one hundred ninety-five thousand, six hundred forty-one".