434021221 has 8 divisors (see below), whose sum is σ = 449614080. Its totient is φ = 418470192.

The previous prime is 434021213. The next prime is 434021233. The reversal of 434021221 is 122120434.

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

It is a cyclic number.

It is not a de Polignac number, because 434021221 - 2³ = 434021213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (434021321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11476 + ... + 31618.

It is an arithmetic number, because the mean of its divisors is an integer number (56201760).

Almost surely, 2^434021221 is an apocalyptic number.

It is an amenable number.

434021221 is a deficient number, since it is larger than the sum of its proper divisors (15592859).

434021221 is a wasteful number, since it uses less digits than its factorization.

434021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20915.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 434021221 is about 20833.1759700723. The cubic root of 434021221 is about 757.1297677016.

Adding to 434021221 its reverse (122120434), we get a palindrome (556141655).

The spelling of 434021221 in words is "four hundred thirty-four million, twenty-one thousand, two hundred twenty-one".