544721 has 2 divisors, whose sum is σ = 544722. Its totient is φ = 544720.

The previous prime is 544717. The next prime is 544723. The reversal of 544721 is 127445.

544721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 541696 + 3025 = 736^2 + 55^2 .

It is a cyclic number.

It is not a de Polignac number, because 544721 - 2² = 544717 is a prime.

Together with 544723, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 544721.

It is not a weakly prime, because it can be changed into another prime (544723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272360 + 272361.

It is an arithmetic number, because the mean of its divisors is an integer number (272361).

2⁵⁴⁴⁷²¹ is an apocalyptic number.

It is an amenable number.

544721 is a deficient number, since it is larger than the sum of its proper divisors (1).

544721 is an equidigital number, since it uses as much as digits as its factorization.

544721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1120, while the sum is 23.

The square root of 544721 is about 738.0521661780. The cubic root of 544721 is about 81.6691507412.

The spelling of 544721 in words is "five hundred forty-four thousand, seven hundred twenty-one".