4448421 has 6 divisors (see below), whose sum is σ = 6425510. Its totient is φ = 2965608.

The previous prime is 4448419. The next prime is 4448443. The reversal of 4448421 is 1248444.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4040100 + 408321 = 2010^2 + 639^2 .

It is not a de Polignac number, because 4448421 - 2¹ = 4448419 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

4448421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4448021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 247126 + ... + 247143.

Almost surely, 2^4448421 is an apocalyptic number.

It is an amenable number.

4448421 is a deficient number, since it is larger than the sum of its proper divisors (1977089).

4448421 is a wasteful number, since it uses less digits than its factorization.

4448421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494275 (or 494272 counting only the distinct ones).

The product of its digits is 4096, while the sum is 27.

The square root of 4448421 is about 2109.1280188742. The cubic root of 4448421 is about 164.4631588183.

The spelling of 4448421 in words is "four million, four hundred forty-eight thousand, four hundred twenty-one".