4221243 has 24 divisors (see below), whose sum is σ = 6646640. Its totient is φ = 2566080.

The previous prime is 4221229. The next prime is 4221247. The reversal of 4221243 is 3421224.

4221243 is a `hidden beast` number, since 422 + 1 + 243 = 666.

It is not a de Polignac number, because 4221243 - 2⁴ = 4221227 is a prime.

4221243 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4221247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12588 + ... + 12918.

Almost surely, 2^4221243 is an apocalyptic number.

4221243 is a deficient number, since it is larger than the sum of its proper divisors (2425397).

4221243 is a wasteful number, since it uses less digits than its factorization.

4221243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459 (or 456 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 4221243 is about 2054.5663776087. The cubic root of 4221243 is about 161.6144236668.

Adding to 4221243 its reverse (3421224), we get a palindrome (7642467).

The spelling of 4221243 in words is "four million, two hundred twenty-one thousand, two hundred forty-three".