4445421 has 8 divisors (see below), whose sum is σ = 5943360. Its totient is φ = 2955552.

The previous prime is 4445393. The next prime is 4445429. The reversal of 4445421 is 1245444.

It is a happy number.

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

It is not a de Polignac number, because 4445421 - 2¹⁰ = 4444397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4445391 and 4445400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4445429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 585 + ... + 3038.

It is an arithmetic number, because the mean of its divisors is an integer number (742920).

Almost surely, 2^4445421 is an apocalyptic number.

It is an amenable number.

4445421 is a deficient number, since it is larger than the sum of its proper divisors (1497939).

4445421 is a wasteful number, since it uses less digits than its factorization.

4445421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4035.

The product of its digits is 2560, while the sum is 24.

The square root of 4445421 is about 2108.4167045440. The cubic root of 4445421 is about 164.4261793723.

The spelling of 4445421 in words is "four million, four hundred forty-five thousand, four hundred twenty-one".