194021 has 8 divisors (see below), whose sum is σ = 209304. Its totient is φ = 179200.

The previous prime is 194017. The next prime is 194027. The reversal of 194021 is 120491.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 45796 + 148225 = 214^2 + 385^2 .

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 194021 - 2² = 194017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 194021.

It is not an unprimeable number, because it can be changed into a prime (194027) 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, 1661 + ... + 1773.

It is an arithmetic number, because the mean of its divisors is an integer number (26163).

2¹⁹⁴⁰²¹ is an apocalyptic number.

It is an amenable number.

194021 is a deficient number, since it is larger than the sum of its proper divisors (15283).

194021 is a wasteful number, since it uses less digits than its factorization.

194021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 194021 is about 440.4781492878. The cubic root of 194021 is about 57.8916924454.

The spelling of 194021 in words is "one hundred ninety-four thousand, twenty-one".