13340521 has 2 divisors, whose sum is σ = 13340522. Its totient is φ = 13340520.

The previous prime is 13340513. The next prime is 13340533. The reversal of 13340521 is 12504331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12503296 + 837225 = 3536^2 + 915^2 .

It is a cyclic number.

It is not a de Polignac number, because 13340521 - 2³ = 13340513 is a prime.

It is not a weakly prime, because it can be changed into another prime (13340501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6670260 + 6670261.

It is an arithmetic number, because the mean of its divisors is an integer number (6670261).

Almost surely, 2^13340521 is an apocalyptic number.

It is an amenable number.

13340521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13340521 is an equidigital number, since it uses as much as digits as its factorization.

13340521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 13340521 is about 3652.4677958881. The cubic root of 13340521 is about 237.1688222508.

Adding to 13340521 its reverse (12504331), we get a palindrome (25844852).

It can be divided in two parts, 13340 and 521, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 13340521 in words is "thirteen million, three hundred forty thousand, five hundred twenty-one".