492021 has 8 divisors (see below), whose sum is σ = 728960. Its totient is φ = 327996.

The previous prime is 492017. The next prime is 492029. The reversal of 492021 is 120294.

It is not a de Polignac number, because 492021 - 2² = 492017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491985 and 492003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (492029) 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 7 ways as a sum of consecutive naturals, for example, 9085 + ... + 9138.

It is an arithmetic number, because the mean of its divisors is an integer number (91120).

2⁴⁹²⁰²¹ is an apocalyptic number.

It is an amenable number.

492021 is a deficient number, since it is larger than the sum of its proper divisors (236939).

492021 is a wasteful number, since it uses less digits than its factorization.

492021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18232 (or 18226 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 492021 is about 701.4420859914. The cubic root of 492021 is about 78.9455909073.

The spelling of 492021 in words is "four hundred ninety-two thousand, twenty-one".