13126181 has 2 divisors, whose sum is σ = 13126182. Its totient is φ = 13126180.

The previous prime is 13126177. The next prime is 13126189. The reversal of 13126181 is 18162131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12013156 + 1113025 = 3466^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 13126181 - 2² = 13126177 is a prime.

It is a super-2 number, since 2×13126181² = 344593255289522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13126189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6563090 + 6563091.

It is an arithmetic number, because the mean of its divisors is an integer number (6563091).

Almost surely, 2^13126181 is an apocalyptic number.

It is an amenable number.

13126181 is a deficient number, since it is larger than the sum of its proper divisors (1).

13126181 is an equidigital number, since it uses as much as digits as its factorization.

13126181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 23.

The square root of 13126181 is about 3623.0071763661. The cubic root of 13126181 is about 235.8917738469.

The spelling of 13126181 in words is "thirteen million, one hundred twenty-six thousand, one hundred eighty-one".