444001421 has 8 divisors (see below), whose sum is σ = 446094240. Its totient is φ = 441913968.

The previous prime is 444001399. The next prime is 444001469. The reversal of 444001421 is 124100444.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 444001421 - 2⁶ = 444001357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 444001393 and 444001402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444001321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303590 + ... + 305048.

It is an arithmetic number, because the mean of its divisors is an integer number (55761780).

Almost surely, 2^444001421 is an apocalyptic number.

It is an amenable number.

444001421 is a deficient number, since it is larger than the sum of its proper divisors (2092819).

444001421 is a wasteful number, since it uses less digits than its factorization.

444001421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2683.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 444001421 is about 21071.3412245163. The cubic root of 444001421 is about 762.8891764466.

Adding to 444001421 its reverse (124100444), we get a palindrome (568101865).

The spelling of 444001421 in words is "four hundred forty-four million, one thousand, four hundred twenty-one".