195645 has 8 divisors (see below), whose sum is σ = 313056. Its totient is φ = 104336.

The previous prime is 195599. The next prime is 195659. The reversal of 195645 is 546591.

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 195645 - 2⁶ = 195581 is a prime.

It is an Ulam number.

It is a Curzon number.

195645 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6507 + ... + 6536.

It is an arithmetic number, because the mean of its divisors is an integer number (39132).

2¹⁹⁵⁶⁴⁵ is an apocalyptic number.

195645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

195645 is a deficient number, since it is larger than the sum of its proper divisors (117411).

195645 is a wasteful number, since it uses less digits than its factorization.

195645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13051.

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

The square root of 195645 is about 442.3177590828. The cubic root of 195645 is about 58.0527660911.

The spelling of 195645 in words is "one hundred ninety-five thousand, six hundred forty-five".