12135181 has 8 divisors (see below), whose sum is σ = 12348000. Its totient is φ = 11924112.

The previous prime is 12135163. The next prime is 12135197. The reversal of 12135181 is 18153121.

12135181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12135181 is a prime.

It is a super-2 number, since 2×12135181² = 294525235805522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12135121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24070 + ... + 24568.

It is an arithmetic number, because the mean of its divisors is an integer number (1543500).

Almost surely, 2^12135181 is an apocalyptic number.

It is an amenable number.

12135181 is a deficient number, since it is larger than the sum of its proper divisors (212819).

12135181 is an equidigital number, since it uses as much as digits as its factorization.

12135181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875.

The product of its digits is 240, while the sum is 22.

The square root of 12135181 is about 3483.5586689476. The cubic root of 12135181 is about 229.7993271712.

The spelling of 12135181 in words is "twelve million, one hundred thirty-five thousand, one hundred eighty-one".