13434521 has 2 divisors, whose sum is σ = 13434522. Its totient is φ = 13434520.

The previous prime is 13434481. The next prime is 13434523. The reversal of 13434521 is 12543431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12503296 + 931225 = 3536^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 13434521 - 2¹⁴ = 13418137 is a prime.

It is a Sophie Germain prime.

Together with 13434523, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13434523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6717260 + 6717261.

It is an arithmetic number, because the mean of its divisors is an integer number (6717261).

Almost surely, 2^13434521 is an apocalyptic number.

It is an amenable number.

13434521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13434521 is an equidigital number, since it uses as much as digits as its factorization.

13434521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 23.

The square root of 13434521 is about 3665.3132199036. The cubic root of 13434521 is about 237.7245654371.

Adding to 13434521 its reverse (12543431), we get a palindrome (25977952).

The spelling of 13434521 in words is "thirteen million, four hundred thirty-four thousand, five hundred twenty-one".