12135171 has 8 divisors (see below), whose sum is σ = 16212304. Its totient is φ = 8074080.

The previous prime is 12135163. The next prime is 12135197. The reversal of 12135171 is 17153121.

It is a happy number.

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

It is not a de Polignac number, because 12135171 - 2³ = 12135163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12135121) 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 in 7 ways as a sum of consecutive naturals, for example, 2116 + ... + 5361.

It is an arithmetic number, because the mean of its divisors is an integer number (2026538).

Almost surely, 2^12135171 is an apocalyptic number.

12135171 is a deficient number, since it is larger than the sum of its proper divisors (4077133).

12135171 is an equidigital number, since it uses as much as digits as its factorization.

12135171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8021.

The product of its digits is 210, while the sum is 21.

The square root of 12135171 is about 3483.5572336335. The cubic root of 12135171 is about 229.7992640491.

Adding to 12135171 its reverse (17153121), we get a palindrome (29288292).

The spelling of 12135171 in words is "twelve million, one hundred thirty-five thousand, one hundred seventy-one".