434401021 has 4 divisors (see below), whose sum is σ = 435409344. Its totient is φ = 433392700.

The previous prime is 434400929. The next prime is 434401043. The reversal of 434401021 is 120104434.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 434401021 - 2¹⁹ = 433876733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 434401021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (434401081) 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, 503515 + ... + 504376.

It is an arithmetic number, because the mean of its divisors is an integer number (108852336).

Almost surely, 2^434401021 is an apocalyptic number.

It is an amenable number.

434401021 is a deficient number, since it is larger than the sum of its proper divisors (1008323).

434401021 is a wasteful number, since it uses less digits than its factorization.

434401021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008322.

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

The square root of 434401021 is about 20842.2892456659. The cubic root of 434401021 is about 757.3505511062.

Adding to 434401021 its reverse (120104434), we get a palindrome (554505455).

The spelling of 434401021 in words is "four hundred thirty-four million, four hundred one thousand, twenty-one".