4221745 has 16 divisors (see below), whose sum is σ = 5624640. Its totient is φ = 3016000.

The previous prime is 4221713. The next prime is 4221751. The reversal of 4221745 is 5471224.

It is not a de Polignac number, because 4221745 - 2⁵ = 4221713 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2595 + ... + 3895.

It is an arithmetic number, because the mean of its divisors is an integer number (351540).

Almost surely, 2^4221745 is an apocalyptic number.

It is an amenable number.

4221745 is a deficient number, since it is larger than the sum of its proper divisors (1402895).

4221745 is a wasteful number, since it uses less digits than its factorization.

4221745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376.

The product of its digits is 2240, while the sum is 25.

The square root of 4221745 is about 2054.6885408743. The cubic root of 4221745 is about 161.6208299335.

Adding to 4221745 its reverse (5471224), we get a palindrome (9692969).

The spelling of 4221745 in words is "four million, two hundred twenty-one thousand, seven hundred forty-five".