434142021 has 4 divisors (see below), whose sum is σ = 578856032. Its totient is φ = 289428012.

The previous prime is 434142019. The next prime is 434142029. The reversal of 434142021 is 120241434.

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 not a de Polignac number, because 434142021 - 2¹ = 434142019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (434142029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72357001 + ... + 72357006.

It is an arithmetic number, because the mean of its divisors is an integer number (144714008).

Almost surely, 2^434142021 is an apocalyptic number.

It is an amenable number.

434142021 is a deficient number, since it is larger than the sum of its proper divisors (144714011).

434142021 is a wasteful number, since it uses less digits than its factorization.

434142021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144714010.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 434142021 is about 20836.0749902663. The cubic root of 434142021 is about 757.2000045068.

Adding to 434142021 its reverse (120241434), we get a palindrome (554383455).

The spelling of 434142021 in words is "four hundred thirty-four million, one hundred forty-two thousand, twenty-one".