13671181 has 2 divisors, whose sum is σ = 13671182. Its totient is φ = 13671180.

The previous prime is 13671173. The next prime is 13671193. The reversal of 13671181 is 18117631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7590025 + 6081156 = 2755^2 + 2466^2 .

It is a cyclic number.

It is not a de Polignac number, because 13671181 - 2³ = 13671173 is a prime.

It is a super-2 number, since 2×13671181² = 373802379869522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13671781) 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, 6835590 + 6835591.

It is an arithmetic number, because the mean of its divisors is an integer number (6835591).

Almost surely, 2^13671181 is an apocalyptic number.

It is an amenable number.

13671181 is a deficient number, since it is larger than the sum of its proper divisors (1).

13671181 is an equidigital number, since it uses as much as digits as its factorization.

13671181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 28.

The square root of 13671181 is about 3697.4560173179. The cubic root of 13671181 is about 239.1123518375.

It can be divided in two parts, 136 and 71181, that added together give a palindrome (71317).

The spelling of 13671181 in words is "thirteen million, six hundred seventy-one thousand, one hundred eighty-one".