434212021 has 2 divisors, whose sum is σ = 434212022. Its totient is φ = 434212020.

The previous prime is 434212007. The next prime is 434212027. The reversal of 434212021 is 120212434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228432996 + 205779025 = 15114^2 + 14345^2 .

It is a cyclic number.

It is not a de Polignac number, because 434212021 - 2¹⁷ = 434080949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 434212021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434212027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217106010 + 217106011.

It is an arithmetic number, because the mean of its divisors is an integer number (217106011).

Almost surely, 2^434212021 is an apocalyptic number.

It is an amenable number.

434212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

434212021 is an equidigital number, since it uses as much as digits as its factorization.

434212021 is an odious number, because the sum of its binary digits is odd.

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

The square root of 434212021 is about 20837.7547015028. The cubic root of 434212021 is about 757.2406986801.

Adding to 434212021 its reverse (120212434), we get a palindrome (554424455).

The spelling of 434212021 in words is "four hundred thirty-four million, two hundred twelve thousand, twenty-one".