434821 has 2 divisors, whose sum is σ = 434822. Its totient is φ = 434820.

The previous prime is 434813. The next prime is 434827. The reversal of 434821 is 128434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 422500 + 12321 = 650^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 434821 - 2³ = 434813 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 434792 and 434801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217410 + 217411.

It is an arithmetic number, because the mean of its divisors is an integer number (217411).

2⁴³⁴⁸²¹ is an apocalyptic number.

It is an amenable number.

434821 is a deficient number, since it is larger than the sum of its proper divisors (1).

434821 is an equidigital number, since it uses as much as digits as its factorization.

434821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 22.

The square root of 434821 is about 659.4095844011. The cubic root of 434821 is about 75.7594541385.

The spelling of 434821 in words is "four hundred thirty-four thousand, eight hundred twenty-one".