434042021 has 4 divisors (see below), whose sum is σ = 496048032. Its totient is φ = 372036012.

The previous prime is 434042009. The next prime is 434042029. The reversal of 434042021 is 120240434.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120240434 = 2 ⋅60120217.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-434042021 is a prime.

It is a super-4 number, since 4×434042021⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 434041984 and 434042002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (434042029) 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, 31002995 + ... + 31003008.

It is an arithmetic number, because the mean of its divisors is an integer number (124012008).

Almost surely, 2^434042021 is an apocalyptic number.

It is an amenable number.

434042021 is a deficient number, since it is larger than the sum of its proper divisors (62006011).

434042021 is an equidigital number, since it uses as much as digits as its factorization.

434042021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62006010.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 434042021 is about 20833.6751678622. The cubic root of 434042021 is about 757.1418623849.

Adding to 434042021 its reverse (120240434), we get a palindrome (554282455).

The spelling of 434042021 in words is "four hundred thirty-four million, forty-two thousand, twenty-one".