195287 has 4 divisors (see below), whose sum is σ = 196176. Its totient is φ = 194400.

The previous prime is 195281. The next prime is 195311. The reversal of 195287 is 782591.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 782591 = 19 ⋅41189.

It is a cyclic number.

It is not a de Polignac number, because 195287 - 2⁴ = 195271 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 (195281) 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 in 3 ways as a sum of consecutive naturals, for example, 158 + ... + 644.

It is an arithmetic number, because the mean of its divisors is an integer number (49044).

2¹⁹⁵²⁸⁷ is an apocalyptic number.

195287 is a deficient number, since it is larger than the sum of its proper divisors (889).

195287 is an equidigital number, since it uses as much as digits as its factorization.

195287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888.

The product of its digits is 5040, while the sum is 32.

The square root of 195287 is about 441.9128873432. The cubic root of 195287 is about 58.0173352859.

The spelling of 195287 in words is "one hundred ninety-five thousand, two hundred eighty-seven".