435221 has 2 divisors, whose sum is σ = 435222. Its totient is φ = 435220.

The previous prime is 435191. The next prime is 435223. The reversal of 435221 is 122534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 286225 + 148996 = 535^2 + 386^2 .

It is a cyclic number.

It is not a de Polignac number, because 435221 - 2¹⁴ = 418837 is a prime.

Together with 435223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 435221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (435223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217610 + 217611.

It is an arithmetic number, because the mean of its divisors is an integer number (217611).

2⁴³⁵²²¹ is an apocalyptic number.

It is an amenable number.

435221 is a deficient number, since it is larger than the sum of its proper divisors (1).

435221 is an equidigital number, since it uses as much as digits as its factorization.

435221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 17.

The square root of 435221 is about 659.7128163072. The cubic root of 435221 is about 75.7826778666.

Adding to 435221 its reverse (122534), we get a palindrome (557755).

It can be divided in two parts, 435 and 221, that added together give a palindrome (656).

The spelling of 435221 in words is "four hundred thirty-five thousand, two hundred twenty-one".