489421 has 4 divisors (see below), whose sum is σ = 515200. Its totient is φ = 463644.

The previous prime is 489409. The next prime is 489427. The reversal of 489421 is 124984.

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 489421 - 2⁵ = 489389 is a prime.

It is a Duffinian number.

489421 is a lucky number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 489421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12861 + ... + 12898.

It is an arithmetic number, because the mean of its divisors is an integer number (128800).

2⁴⁸⁹⁴²¹ is an apocalyptic number.

It is an amenable number.

489421 is a deficient number, since it is larger than the sum of its proper divisors (25779).

489421 is a wasteful number, since it uses less digits than its factorization.

489421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25778.

The product of its digits is 2304, while the sum is 28.

The square root of 489421 is about 699.5863063268. The cubic root of 489421 is about 78.8062871292.

The spelling of 489421 in words is "four hundred eighty-nine thousand, four hundred twenty-one".