434320521 has 4 divisors (see below), whose sum is σ = 579094032. Its totient is φ = 289547012.

The previous prime is 434320517. The next prime is 434320543. The reversal of 434320521 is 125023434.

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 434320521 - 2² = 434320517 is a prime.

It is a super-2 number, since 2×434320521² = 377268629923422882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 434320491 and 434320500.

It is not an unprimeable number, because it can be changed into a prime (434322521) 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, 72386751 + ... + 72386756.

It is an arithmetic number, because the mean of its divisors is an integer number (144773508).

Almost surely, 2^434320521 is an apocalyptic number.

It is an amenable number.

434320521 is a deficient number, since it is larger than the sum of its proper divisors (144773511).

434320521 is a wasteful number, since it uses less digits than its factorization.

434320521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144773510.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 434320521 is about 20840.3579863687. The cubic root of 434320521 is about 757.3037660062.

Adding to 434320521 its reverse (125023434), we get a palindrome (559343955).

The spelling of 434320521 in words is "four hundred thirty-four million, three hundred twenty thousand, five hundred twenty-one".