434345021 has 16 divisors (see below), whose sum is σ = 496698048. Its totient is φ = 376252800.

The previous prime is 434345003. The next prime is 434345039. The reversal of 434345021 is 120543434.

It is an interprime number because it is at equal distance from previous prime (434345003) and next prime (434345039).

It is not a de Polignac number, because 434345021 - 2⁶ = 434344957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (434345621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8195 + ... + 30591.

It is an arithmetic number, because the mean of its divisors is an integer number (31043628).

Almost surely, 2^434345021 is an apocalyptic number.

434345021 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

434345021 is a deficient number, since it is larger than the sum of its proper divisors (62353027).

434345021 is a wasteful number, since it uses less digits than its factorization.

434345021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22492.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 434345021 is about 20840.9457798824. The cubic root of 434345021 is about 757.3180055616.

Adding to 434345021 its reverse (120543434), we get a palindrome (554888455).

The spelling of 434345021 in words is "four hundred thirty-four million, three hundred forty-five thousand, twenty-one".