12535181 has 2 divisors, whose sum is σ = 12535182. Its totient is φ = 12535180.

The previous prime is 12535151. The next prime is 12535183. The reversal of 12535181 is 18153521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12187081 + 348100 = 3491^2 + 590^2 .

It is a cyclic number.

It is not a de Polignac number, because 12535181 - 2²² = 8340877 is a prime.

It is a super-2 number, since 2×12535181² = 314261525405522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 12535183, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12535181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12535183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6267590 + 6267591.

It is an arithmetic number, because the mean of its divisors is an integer number (6267591).

Almost surely, 2^12535181 is an apocalyptic number.

It is an amenable number.

12535181 is a deficient number, since it is larger than the sum of its proper divisors (1).

12535181 is an equidigital number, since it uses as much as digits as its factorization.

12535181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 26.

The square root of 12535181 is about 3540.5057548322. The cubic root of 12535181 is about 232.2969653851.

The spelling of 12535181 in words is "twelve million, five hundred thirty-five thousand, one hundred eighty-one".