434421221 has 4 divisors (see below), whose sum is σ = 467838252. Its totient is φ = 401004192.

The previous prime is 434421167. The next prime is 434421227. The reversal of 434421221 is 122124434.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121308196 + 313113025 = 11014^2 + 17695^2 .

It is a cyclic number.

It is not a de Polignac number, because 434421221 - 2⁶ = 434421157 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 (434421227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16708496 + ... + 16708521.

It is an arithmetic number, because the mean of its divisors is an integer number (116959563).

Almost surely, 2^434421221 is an apocalyptic number.

It is an amenable number.

434421221 is a deficient number, since it is larger than the sum of its proper divisors (33417031).

434421221 is a wasteful number, since it uses less digits than its factorization.

434421221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33417030.

The product of its digits is 1536, while the sum is 23.

The square root of 434421221 is about 20842.7738317144. The cubic root of 434421221 is about 757.3622900627.

Adding to 434421221 its reverse (122124434), we get a palindrome (556545655).

The spelling of 434421221 in words is "four hundred thirty-four million, four hundred twenty-one thousand, two hundred twenty-one".