195621 has 8 divisors (see below), whose sum is σ = 262944. Its totient is φ = 129360.

The previous prime is 195599. The next prime is 195659. The reversal of 195621 is 126591.

195621 is nontrivially palindromic in base 12.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 195621 - 2⁷ = 195493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 195591 and 195600.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 195621.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426 + ... + 756.

It is an arithmetic number, because the mean of its divisors is an integer number (32868).

2¹⁹⁵⁶²¹ is an apocalyptic number.

It is an amenable number.

195621 is a deficient number, since it is larger than the sum of its proper divisors (67323).

195621 is a wasteful number, since it uses less digits than its factorization.

195621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531.

The product of its digits is 540, while the sum is 24.

The square root of 195621 is about 442.2906284334. The cubic root of 195621 is about 58.0503921939.

The spelling of 195621 in words is "one hundred ninety-five thousand, six hundred twenty-one".