434040421 has 4 divisors (see below), whose sum is σ = 434082412. Its totient is φ = 433998432.

The previous prime is 434040367. The next prime is 434040461. The reversal of 434040421 is 124040434.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 211702500 + 222337921 = 14550^2 + 14911^2 .

It is a cyclic number.

It is not a de Polignac number, because 434040421 - 2¹³ = 434032229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 434040392 and 434040401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (434040461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6601 + ... + 30193.

It is an arithmetic number, because the mean of its divisors is an integer number (108520603).

Almost surely, 2^434040421 is an apocalyptic number.

It is an amenable number.

434040421 is a deficient number, since it is larger than the sum of its proper divisors (41991).

434040421 is a wasteful number, since it uses less digits than its factorization.

434040421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41990.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 434040421 is about 20833.6367684569. The cubic root of 434040421 is about 757.1409320384.

Adding to 434040421 its reverse (124040434), we get a palindrome (558080855).

The spelling of 434040421 in words is "four hundred thirty-four million, forty thousand, four hundred twenty-one".