12542171 has 4 divisors (see below), whose sum is σ = 12562032. Its totient is φ = 12522312.

The previous prime is 12542143. The next prime is 12542177. The reversal of 12542171 is 17124521.

12542171 is an esthetic number in base 3, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12542171 - 2¹⁰ = 12541147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12542177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8951 + ... + 10256.

It is an arithmetic number, because the mean of its divisors is an integer number (3140508).

Almost surely, 2^12542171 is an apocalyptic number.

12542171 is a deficient number, since it is larger than the sum of its proper divisors (19861).

12542171 is an equidigital number, since it uses as much as digits as its factorization.

12542171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19860.

The product of its digits is 560, while the sum is 23.

The square root of 12542171 is about 3541.4927643580. The cubic root of 12542171 is about 232.3401359906.

Adding to 12542171 its reverse (17124521), we get a palindrome (29666692).

The spelling of 12542171 in words is "twelve million, five hundred forty-two thousand, one hundred seventy-one".