184021 has 4 divisors (see below), whose sum is σ = 187200. Its totient is φ = 180844.

The previous prime is 184013. The next prime is 184031. The reversal of 184021 is 120481.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120481 = 211 ⋅571.

It is a cyclic number.

It is not a de Polignac number, because 184021 - 2³ = 184013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 183986 and 184004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (184031) 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, 1501 + ... + 1618.

It is an arithmetic number, because the mean of its divisors is an integer number (46800).

2¹⁸⁴⁰²¹ is an apocalyptic number.

It is an amenable number.

184021 is a deficient number, since it is larger than the sum of its proper divisors (3179).

184021 is an equidigital number, since it uses as much as digits as its factorization.

184021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3178.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 184021 is about 428.9766893434. The cubic root of 184021 is about 56.8795033266.

The spelling of 184021 in words is "one hundred eighty-four thousand, twenty-one".