195541 has 2 divisors, whose sum is σ = 195542. Its totient is φ = 195540.
The previous prime is 195539. The next prime is 195581. The reversal of 195541 is 145591.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 125316 + 70225 = 354^2 + 265^2 .
It is a cyclic number.
It is not a de Polignac number, because 195541 - 21 = 195539 is a prime.
Together with 195539, it forms a pair of twin primes.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (195511) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97770 + 97771.
It is an arithmetic number, because the mean of its divisors is an integer number (97771).
2195541 is an apocalyptic number.
It is an amenable number.
195541 is a deficient number, since it is larger than the sum of its proper divisors (1).
195541 is an equidigital number, since it uses as much as digits as its factorization.
195541 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 900, while the sum is 25.
The square root of 195541 is about 442.2001809136. The cubic root of 195541 is about 58.0424778006.
The spelling of 195541 in words is "one hundred ninety-five thousand, five hundred forty-one".
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