4221425 has 24 divisors (see below), whose sum is σ = 5832960. Its totient is φ = 3009600.

The previous prime is 4221421. The next prime is 4221433. The reversal of 4221425 is 5241224.

It is a happy number.

It is not a de Polignac number, because 4221425 - 2² = 4221421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4221397 and 4221406.

It is not an unprimeable number, because it can be changed into a prime (4221421) 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, 9866 + ... + 10284.

It is an arithmetic number, because the mean of its divisors is an integer number (243040).

Almost surely, 2^4221425 is an apocalyptic number.

It is an amenable number.

4221425 is a deficient number, since it is larger than the sum of its proper divisors (1611535).

4221425 is a wasteful number, since it uses less digits than its factorization.

4221425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 468 counting only the distinct ones).

The product of its digits is 640, while the sum is 20.

The square root of 4221425 is about 2054.6106687156. The cubic root of 4221425 is about 161.6167463162.

Adding to 4221425 its reverse (5241224), we get a palindrome (9462649).

The spelling of 4221425 in words is "four million, two hundred twenty-one thousand, four hundred twenty-five".