434221021 has 8 divisors (see below), whose sum is σ = 495130104. Its totient is φ = 377241600.

The previous prime is 434220977. The next prime is 434221049. The reversal of 434221021 is 120122434.

It can be written as a sum of positive squares in 4 ways, for example, as 7344100 + 426876921 = 2710^2 + 20661^2 .

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 434221021 - 2¹⁷ = 434089949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 434221021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (434221091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 982180 + ... + 982621.

It is an arithmetic number, because the mean of its divisors is an integer number (61891263).

Almost surely, 2^434221021 is an apocalyptic number.

It is an amenable number.

434221021 is a deficient number, since it is larger than the sum of its proper divisors (60909083).

434221021 is a wasteful number, since it uses less digits than its factorization.

434221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964831.

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

The square root of 434221021 is about 20837.9706545527. The cubic root of 434221021 is about 757.2459304707.

Adding to 434221021 its reverse (120122434), we get a palindrome (554343455).

The spelling of 434221021 in words is "four hundred thirty-four million, two hundred twenty-one thousand, twenty-one".