434135521 has 2 divisors, whose sum is σ = 434135522. Its totient is φ = 434135520.

The previous prime is 434135509. The next prime is 434135543. The reversal of 434135521 is 125531434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311169600 + 122965921 = 17640^2 + 11089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-434135521 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 434135521.

It is not a weakly prime, because it can be changed into another prime (434135591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217067760 + 217067761.

It is an arithmetic number, because the mean of its divisors is an integer number (217067761).

Almost surely, 2^434135521 is an apocalyptic number.

It is an amenable number.

434135521 is a deficient number, since it is larger than the sum of its proper divisors (1).

434135521 is an equidigital number, since it uses as much as digits as its factorization.

434135521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 28.

The square root of 434135521 is about 20835.9190102093. The cubic root of 434135521 is about 757.1962255402.

Adding to 434135521 its reverse (125531434), we get a palindrome (559666955).

The spelling of 434135521 in words is "four hundred thirty-four million, one hundred thirty-five thousand, five hundred twenty-one".