444421 has 2 divisors, whose sum is σ = 444422.
Its totient is φ = 444420.
The previous prime is 444403. The next prime is 444443. The reversal of 444421 is 124444.
Adding to 444421 its reverse (124444), we get a palindrome (568865).
It can be divided in two parts, 4444 and 21, that added together give a triangular number (4465 = T94).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 408321 + 36100 = 639^2 + 190^2
It is a cyclic number.
It is not a de Polignac number, because 444421 - 27 = 444293 is a prime.
It is a super-3 number, since 3×4444213 = 263332808782891383, which contains 333 as substring.
It is a nialpdrome in base 10.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (444401) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222210 + 222211.
It is an arithmetic number, because the mean of its divisors is an integer number (222211).
2444421 is an apocalyptic number.
It is an amenable number.
444421 is a deficient number, since it is larger than the sum of its proper divisors (1).
444421 is an equidigital number, since it uses as much as digits as its factorization.
444421 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 512, while the sum is 19.
The square root of 444421 is about 666.6490831014.
The cubic root of 444421 is about 76.3129409538.
The spelling of 444421 in words is "four hundred forty-four thousand, four hundred twenty-one", and thus it is an iban number.