544421 has 4 divisors (see below), whose sum is σ = 545952. Its totient is φ = 542892.

The previous prime is 544403. The next prime is 544429. The reversal of 544421 is 124445.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 124445 = 5 ⋅24889.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-544421 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 544393 and 544402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (544429) 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, 80 + ... + 1046.

It is an arithmetic number, because the mean of its divisors is an integer number (136488).

2⁵⁴⁴⁴²¹ is an apocalyptic number.

It is an amenable number.

544421 is a deficient number, since it is larger than the sum of its proper divisors (1531).

544421 is an equidigital number, since it uses as much as digits as its factorization.

544421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530.

The product of its digits is 640, while the sum is 20.

The square root of 544421 is about 737.8489005210. The cubic root of 544421 is about 81.6541551475.

Adding to 544421 its reverse (124445), we get a palindrome (668866).

The spelling of 544421 in words is "five hundred forty-four thousand, four hundred twenty-one".