13012261 has 2 divisors, whose sum is σ = 13012262. Its totient is φ = 13012260.

The previous prime is 13012247. The next prime is 13012291. The reversal of 13012261 is 16221031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13003236 + 9025 = 3606^2 + 95^2 .

It is an emirp because it is prime and its reverse (16221031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13012261 - 2⁵ = 13012229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13012231) 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, 6506130 + 6506131.

It is an arithmetic number, because the mean of its divisors is an integer number (6506131).

Almost surely, 2^13012261 is an apocalyptic number.

It is an amenable number.

13012261 is a deficient number, since it is larger than the sum of its proper divisors (1).

13012261 is an equidigital number, since it uses as much as digits as its factorization.

13012261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 13012261 is about 3607.2511695195. The cubic root of 13012261 is about 235.2073678893.

Adding to 13012261 its reverse (16221031), we get a palindrome (29233292).

The spelling of 13012261 in words is "thirteen million, twelve thousand, two hundred sixty-one".