434005421 has 2 divisors, whose sum is σ = 434005422. Its totient is φ = 434005420.

The previous prime is 434005361. The next prime is 434005447. The reversal of 434005421 is 124500434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 421480900 + 12524521 = 20530^2 + 3539^2 .

It is a cyclic number.

It is not a de Polignac number, because 434005421 - 2¹⁴ = 433989037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434005721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217002710 + 217002711.

It is an arithmetic number, because the mean of its divisors is an integer number (217002711).

Almost surely, 2^434005421 is an apocalyptic number.

It is an amenable number.

434005421 is a deficient number, since it is larger than the sum of its proper divisors (1).

434005421 is an equidigital number, since it uses as much as digits as its factorization.

434005421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 434005421 is about 20832.7967637569. The cubic root of 434005421 is about 757.1205801359.

Adding to 434005421 its reverse (124500434), we get a palindrome (558505855).

The spelling of 434005421 in words is "four hundred thirty-four million, five thousand, four hundred twenty-one".