194921 has 4 divisors (see below), whose sum is σ = 205200. Its totient is φ = 184644.

The previous prime is 194917. The next prime is 194933. The reversal of 194921 is 129491.

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.

It is a cyclic number.

It is not a de Polignac number, because 194921 - 2² = 194917 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 194921.

It is not an unprimeable number, because it can be changed into a prime (194911) 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, 5111 + ... + 5148.

It is an arithmetic number, because the mean of its divisors is an integer number (51300).

2¹⁹⁴⁹²¹ is an apocalyptic number.

It is an amenable number.

194921 is a deficient number, since it is larger than the sum of its proper divisors (10279).

194921 is a wasteful number, since it uses less digits than its factorization.

194921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10278.

The product of its digits is 648, while the sum is 26.

The square root of 194921 is about 441.4985843692. The cubic root of 194921 is about 57.9810679391.

The spelling of 194921 in words is "one hundred ninety-four thousand, nine hundred twenty-one".