13118641 has 2 divisors, whose sum is σ = 13118642. Its totient is φ = 13118640.

The previous prime is 13118639. The next prime is 13118653. The reversal of 13118641 is 14681131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11971600 + 1147041 = 3460^2 + 1071^2 .

It is an emirp because it is prime and its reverse (14681131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13118641 - 2¹ = 13118639 is a prime.

Together with 13118639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13118141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6559320 + 6559321.

It is an arithmetic number, because the mean of its divisors is an integer number (6559321).

Almost surely, 2^13118641 is an apocalyptic number.

It is an amenable number.

13118641 is a deficient number, since it is larger than the sum of its proper divisors (1).

13118641 is an equidigital number, since it uses as much as digits as its factorization.

13118641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 25.

The square root of 13118641 is about 3621.9664548419. The cubic root of 13118641 is about 235.8465978574.

Adding to 13118641 its reverse (14681131), we get a palindrome (27799772).

The spelling of 13118641 in words is "thirteen million, one hundred eighteen thousand, six hundred forty-one".