12871181 has 2 divisors, whose sum is σ = 12871182. Its totient is φ = 12871180.

The previous prime is 12871129. The next prime is 12871207. The reversal of 12871181 is 18117821.

12871181 is nontrivially palindromic in base 5.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11115556 + 1755625 = 3334^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 12871181 - 2¹⁰ = 12870157 is a prime.

It is a super-2 number, since 2×12871181² = 331334600669522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12871081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6435590 + 6435591.

It is an arithmetic number, because the mean of its divisors is an integer number (6435591).

Almost surely, 2^12871181 is an apocalyptic number.

It is an amenable number.

12871181 is a deficient number, since it is larger than the sum of its proper divisors (1).

12871181 is an equidigital number, since it uses as much as digits as its factorization.

12871181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896, while the sum is 29.

The square root of 12871181 is about 3587.6428194568. The cubic root of 12871181 is about 234.3542313093.

The spelling of 12871181 in words is "twelve million, eight hundred seventy-one thousand, one hundred eighty-one".