425004221 has 8 divisors (see below), whose sum is σ = 434367360. Its totient is φ = 415654528.

The previous prime is 425004169. The next prime is 425004227. The reversal of 425004221 is 122400524.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425004221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 425004193 and 425004202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425004227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86390 + ... + 91176.

It is an arithmetic number, because the mean of its divisors is an integer number (54295920).

Almost surely, 2^425004221 is an apocalyptic number.

It is an amenable number.

425004221 is a deficient number, since it is larger than the sum of its proper divisors (9363139).

425004221 is a wasteful number, since it uses less digits than its factorization.

425004221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6723.

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

The square root of 425004221 is about 20615.6305021214. The cubic root of 425004221 is about 751.8497871511.

Adding to 425004221 its reverse (122400524), we get a palindrome (547404745).

The spelling of 425004221 in words is "four hundred twenty-five million, four thousand, two hundred twenty-one".