13525261 has 2 divisors, whose sum is σ = 13525262. Its totient is φ = 13525260.

The previous prime is 13525243. The next prime is 13525271. The reversal of 13525261 is 16252531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6791236 + 6734025 = 2606^2 + 2595^2 .

It is an emirp because it is prime and its reverse (16252531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13525261 - 2⁷ = 13525133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13525231) 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, 6762630 + 6762631.

It is an arithmetic number, because the mean of its divisors is an integer number (6762631).

Almost surely, 2^13525261 is an apocalyptic number.

It is an amenable number.

13525261 is a deficient number, since it is larger than the sum of its proper divisors (1).

13525261 is an equidigital number, since it uses as much as digits as its factorization.

13525261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 13525261 is about 3677.6705942757. The cubic root of 13525261 is about 238.2585813243.

Adding to 13525261 its reverse (16252531), we get a palindrome (29777792).

The spelling of 13525261 in words is "thirteen million, five hundred twenty-five thousand, two hundred sixty-one".