13507121 has 2 divisors, whose sum is σ = 13507122. Its totient is φ = 13507120.

The previous prime is 13507073. The next prime is 13507139. The reversal of 13507121 is 12170531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10817521 + 2689600 = 3289^2 + 1640^2 .

It is an emirp because it is prime and its reverse (12170531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13507121 - 2⁶ = 13507057 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13507093 and 13507102.

It is not a weakly prime, because it can be changed into another prime (13507721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6753560 + 6753561.

It is an arithmetic number, because the mean of its divisors is an integer number (6753561).

Almost surely, 2^13507121 is an apocalyptic number.

It is an amenable number.

13507121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13507121 is an equidigital number, since it uses as much as digits as its factorization.

13507121 is an odious number, because the sum of its binary digits is odd.

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

The square root of 13507121 is about 3675.2035317789. The cubic root of 13507121 is about 238.1520166691.

Adding to 13507121 its reverse (12170531), we get a palindrome (25677652).

The spelling of 13507121 in words is "thirteen million, five hundred seven thousand, one hundred twenty-one".