13120517 has 2 divisors, whose sum is σ = 13120518. Its totient is φ = 13120516.

The previous prime is 13120489. The next prime is 13120529. The reversal of 13120517 is 71502131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12859396 + 261121 = 3586^2 + 511^2 .

It is an emirp because it is prime and its reverse (71502131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13120517 - 2¹⁶ = 13054981 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13120537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6560258 + 6560259.

It is an arithmetic number, because the mean of its divisors is an integer number (6560259).

Almost surely, 2^13120517 is an apocalyptic number.

It is an amenable number.

13120517 is a deficient number, since it is larger than the sum of its proper divisors (1).

13120517 is an equidigital number, since it uses as much as digits as its factorization.

13120517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 13120517 is about 3622.2254209256. The cubic root of 13120517 is about 235.8578395485.

Adding to 13120517 its reverse (71502131), we get a palindrome (84622648).

The spelling of 13120517 in words is "thirteen million, one hundred twenty thousand, five hundred seventeen".